Malicious PDF — malware analysis report

Static analysis result for SHA-256 a280eefc0601423b…

MALICIOUS

PDF

85.5 KB Created: 2021-06-21 13:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1b0db6c64310760cfa0a07141029cf41 SHA-1: 1ad45d225ebd3d3caef5232809c2c66584d66d90 SHA-256: a280eefc0601423b0c66f214d08eb76166efadcaceaa3cbd910ea7ee7802b167
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to 'Nfs most wanted 2012 online crack', indicating a phishing or social engineering attempt. It utilizes numerous links pointing to compromised CMS uploads, specifically WordPress sites, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160764e18bd269---33555710084.pdf In PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/2931998317.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c127ec99ab---29405347207.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/77c570c6dfeb2cb99ddc6a4f07e4127f/74377682919.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/mezofixek.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/zimabumuburipubadu.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a65f2b007---zuwiramotununoleragamip.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/p8tksd45u8ecs37o1bktpbq7te/40865714298.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e64b06740---91685740709.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6f50d26dbb609f6c8e0b669cbc68c1f9/xafevorevugimegomudow.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae11da2b827---nedimebabukakusi.pdfIn PDF document text
    • http://dentherapia.hu/files/file/bafutigavuwokura.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/oq6mfloe1s3ua77fv89hv2umo8/nujurimajexomizukuxawe.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081919e5e1dc---wedikedigujulikoxuwo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f8f66c120---99116204382.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/godop.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210528_7CD7E884BFDA60C1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=nfs+most+wanted+2012+online+crackPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 4720 bytes
SHA-256: 9da77cc928183931481a6b5bd6236de462502969469b22252a8559b28fcb90dd
font_01_sfnt_off0000f8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B7 5616 bytes
SHA-256: f57c8df8e1bd568de4972c795db269307247dbc35a55ce7852d1e609efb1c036
font_02_sfnt_off00010bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDC 11440 bytes
SHA-256: 116f1d16a8de11f14236db79de58775e73fafe3843df3728ad76ae845a619f8c
font_03_sfnt_off00013325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13325 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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