Malicious PDF — malware analysis report

Static analysis result for SHA-256 229eac9c054b92da…

MALICIOUS

PDF

82.8 KB Created: 2021-08-18 01:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 444fc2a555351b5513b9e0fce90a116f SHA-1: ac96b712123eb02519044f73d67dafdc06b16b93 SHA-256: 229eac9c054b92dad52ceb6ca89189f6cb453d7a0d0bfef62cf429634791197c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to potentially compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it may attempt to exploit PDF vulnerabilities or redirect users to malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://amblesidewindermere.ca/fckuploads/images/file/76185664557.pdf In PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/4488960202.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1fa48d49c3c7441c33c5f9eb9e625ff6/9711232289.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/xorafaromokirunaxedalexe.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/4fd625ab2c03a91674907624a8f9b1be/nepimevej.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/kebefifazasikeberu.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/zaguzi.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/zeruvetogigobe.pdfIn PDF document text
    • https://ijp2.com/contents/files/52708888240.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/82955886139.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f26081d3e7---lunetu.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/kudixipekazirud.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/nimezotuxag.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7623fb4108---kudolulur.pdfIn PDF document text
    • https://jagamimpi.com/contents//files/rosobasisigagox.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/23551063150.pdfIn PDF document text
    • https://anup.bo/images/files/95505704500.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/timamivuzilikinoxolujivu.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/95500528137.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/xegatakanev.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/88a439bff9b54cd041a1cff512b46615/rokamivunezokomunamafefus.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/75454502708.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=libro+forma+espacio+y+orden+pdf+gratisPDF link annotation
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/16381459072.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 18176 bytes
SHA-256: 224f2eff1b1f9b1a39a5083526308c0bb1001f407180b02f346ca13e4266c9be
font_01_sfnt_off00010ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE9 11128 bytes
SHA-256: 3727164e79aeefe7883a5505b779fce5f2aa8bbce610aa1d9154c1b1ec2f9a23
font_02_sfnt_off00012487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12487 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1