Malicious PDF — malware analysis report

Static analysis result for SHA-256 2723eaa88beaf740…

MALICIOUS

PDF

83.4 KB Created: 2021-06-15 23:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 50bce93b65db142889ada30daeeacf50 SHA-1: 3388698adfbbeab5bd58763d86e8c90c45451a49 SHA-256: 2723eaa88beaf74026dd1f982615daa9f67b1b9b5ad0771600b8b926b14f2b73
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://allytemp.ru/uplcv?utm_term=grandma+seduces+her+grandson PDF link annotation
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/a4c7cff329953e6ebcd8a07b76af49b0/76962911905.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/kv9df60ppdmkpb2g6lpc0dt58s/36126414277.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aff654023b9---57366742554.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/4cabb7e833b03572494cbb03941b8353/pijofefetofuvo.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/f22685dd3b993266d415843fe8a2e33d/37027496304.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3fab0c16aaf4a82c45b161892a6a00da/zemujuwarunanemuj.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210514004738.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/aifjr999pdi14a6ra3i22vt02o/dugefovina.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/e31c29fe2c051804ede7e62a7ed0124d/32687209834.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/bc77b44f8fdb9f95b2554fd69bc693e1/51827269978.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16080535ee0e3c---zevoti.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/64244cad27ca5bc2fb1957924830c534/tajopugazojusegenad.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f454e7836b---vuruporefirafenoni.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/7076101128.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/fitinetidos.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac05b05cbda---mobolijar.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/772902962.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/verabepovopokusit.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ir51egsrd33a2qqvqopsdcsbh5/rajejofejuwado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10760 5352 bytes
SHA-256: ad2a9ce044fdefaaacf21fb80caa3da53db80ffe99603d73f5e86db0ca035b84
font_01_sfnt_off0001196b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196B 11684 bytes
SHA-256: a7029c602f9eb5fc1dcc3a8ec6c780dfa54c475535c7e76aa9079de26575142b

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