Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e784a2abb59b6d6…

MALICIOUS

PDF

119.6 KB Created: 2021-06-29 20:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 71b5eb2f9e53f92aa37d1a65680df1c1 SHA-1: 412e8b5b64aff461dd5d3b7ad4b2e4c73c1404a0 SHA-256: 3e784a2abb59b6d65615ab53ba84406f64848997c1dd620d9174f7f37e9e730a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for malware or phishing content. The presence of external URIs and a link farm on disposable hosting suggests an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6f7a1bb2a---13161135613.pdf PDF link annotation
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/9ee1517ffb8349503ae90e53fe6245d6/vitabinulo.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/52952d3e4e930436cea3bb2317389ad5/megumanetaxetadopofuwibad.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9f8b397216ee0bbd4c4e12096c8bd4a2/67709259669.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d740be5be58---pisexagomazovuni.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d613c9f206---21501687559.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/79791027948.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1d3539e8c---45737190782.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/dd7c163ddb3c5433c3210f0b26155285/49604845592.pdfIn PDF document text
    • http://orem.mn/uploads/files/50962778190.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160787fe3c9122---nuradu.pdfIn PDF document text
    • https://energooptima.hu/upload/File/naderizerokubuzawe.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/46902552fc91db07a7cf36ae658136b4/10009965013.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d66a257f95e---ribipususanud.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/tuxojuluvilelot.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/p9qpolsf4c258ikfkttcq8vqh4/27537193752.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b392511d162---91334379793.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/0dcdaaf05350cf9f3f735e773b660fff/20296250143.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2db488890---15920761082.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075d0b2bbd79---sesaxubowupetudoxelaz.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/msh3jaho1qb5tvno2db2pvan10/xamanetetudedixokoru.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/6e5baa2fc4d4d7879b5f02444f337782/22353013136.pdfIn PDF document text
    • http://metall-press.ru/files/7782954159.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/98d9619b2c500aac2b40fe00d07f523f/25438935232.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=5+star+clPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5A 9812 bytes
SHA-256: 58512bbe77d4fe2ab89ceedd5800c74712ec93d9e7b00e616f3a766f318980e9
font_01_sfnt_off00016103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16103 4248 bytes
SHA-256: 4bcabd3271b595315d23f6cf3892c84e8f85d8cda6813cafa4c3890d44f82c02
font_02_sfnt_off000170dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170DC 16684 bytes
SHA-256: a801b2d5d1dfd7db62ab2e60ff3aa9f3d70494034281d6570eb2337a4eaef209
font_03_sfnt_off000187a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00019fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FBA 18520 bytes
SHA-256: 047091e62c4b434d247c40eb001481f34801c45429d1878a90b6ad214684b285

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