Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd1f3795ef9bb19…

MALICIOUS

PDF

99.4 KB Created: 2021-06-14 18:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9717332b8cf70bc2a25dc37580330eb0 SHA-1: 08c42e8da34775b77e4215be4468ef09a6109b0b SHA-256: afd1f3795ef9bb19a46a1a6e7f20402e90d92e1748cf32b68decd77a5fab0e3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to a story, likely intended to trick users into clicking the embedded links. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/uplcv?utm_term=bhai+bahan+ki+xxx+story PDF link annotation
    • http://kayapaliinsaat.net/file/31801505629.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/32bdb371bbc4394cf808a907b4cdaeff/82655359881.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/58071b9c760c81213eaaf34a3d54763f/36937330585.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/2de603e219721275b3898a84a1b5e304/bedimege.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160843ee8a61f3---31127701847.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/79094809308.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4f1198201---91482991612.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/cd941fe242a8cabc6e897167b7293d2f/kivujolonafibudelemid.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/40181104146.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/39384001882.pdfIn PDF document text
    • https://digireg.se/upload/rijiparegowizevenir.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/wovitis.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/85afa341e527f3a48fc29b12fe0e7e7e/23872969263.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/zozikinagukifug.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/kr49407bv66gpmc20j45r4h0qj/tuleminamitamumeximita.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001106f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106F 4832 bytes
SHA-256: 1ce14e9b91777d93605d91b0dd5938be8f5d0383e8d7c9ba250341dd2a584d9b
font_01_sfnt_off000120bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BC 9504 bytes
SHA-256: 7dd67f1be6bb850ce9bbfb4ee7164d1bf08f2363dd3eb2f4d9f134f39e601d39
font_02_sfnt_off00014122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14122 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
font_03_sfnt_off00014f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F23 16060 bytes
SHA-256: c74bc5c431dea20fcf6f537d28c386b13178795656ed70952e02b5d41cb93052