Malicious PDF — malware analysis report

Static analysis result for SHA-256 c785e8b1a68a1c5e…

MALICIOUS

PDF

81.3 KB Created: 2021-09-07 20:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 62b6781c03099ad72e6ed35c054f8205 SHA-1: f3c3118fe7b48ddd60cde25f6d243b673349b228 SHA-256: c785e8b1a68a1c5ed55f4e0a8dbe3541357a45086434a81455b54f27ab5ec24b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://makenie.com/upload/files/mitituvaxovedibuduzozu.pdf In PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e75d9e26235---53243062329.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb590d2a71---mugapomekedawuzowu.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/10f40227168cb209b9b5c14f2d3affe0/rosajatowevotiwi.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/sasiderurelojamiw.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/36620275156.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/nafosim.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/veb6ecbd7aug63cgj0j420lq3c/latobat.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/58835461446.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/dubofolulax.pdfIn PDF document text
    • http://ecole.ru/text/images/file/mazeteduvenovitilefu.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/45076461292.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/puxivamad.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/88991853355.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/gebamelekevugivima.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/263q533k9gnqfhtat23tprfpvs/41702215939.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/27461206609.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/55220954155.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/0iump1sfhn6e5o1gboe7qmhpaq/dutaxalifezitasuzizizo.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/4757587234.pdfIn PDF document text
    • http://malifer.hu/upload/file/23093386131.pdfIn PDF document text
    • http://shriramashramps.org/userfiles/file/limimevofa.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/55513047600.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=heartstart+frx+defibrillator+owners+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 10932 bytes
SHA-256: 09ab8c3aec3d9e99c7113fcdae11f956ac55944376e848c7d60fa2f10209bcca
font_01_sfnt_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 17140 bytes
SHA-256: fc288f4dfd8e700924042ae27fde0dd068e2f26a8e0bb542e423e29791ffa872
font_02_sfnt_off00011fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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