Malicious PDF — malware analysis report

Static analysis result for SHA-256 60842e92af34d2a3…

MALICIOUS

PDF

81.4 KB Created: 2021-06-24 17:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24749e99ac881ac63f578e61b5a55f35 SHA-1: 7663c6ff8d17df512bb31c5c788cca4edfdcc6a1 SHA-256: 60842e92af34d2a3ef07ad7a9ce062effeedfea11640ef25562186efb4faad4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS uploads and disposable domains. The primary purpose appears to be directing users to potentially harmful external content.

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=ffxiv+black+mage+rotation+level+80
    • https://p87.hu/files/72580171413.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/qnvkctap9j10uh40kla69pm98k/64229239010.pdf
    • http://greenbrier101.com/userimages/lurog.pdf
    • https://cytairtool.com/test/userfiles/file/20210617_5a9bd.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/8f53271a307a6b67dfe2c2ea4bdcb415/jewufasabe.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/270bf4ab9c9530cb16325231e6058265/78736445927.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be46a86481f---64421313194.pdf
    • https://sonarmusic.hu/up_image/file/lapamipapavonoputirewe.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/9215d4bc534b8123c13d5d22daefa550/pokadabixupidolatokafipux.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074d42557bb2---wagekelemojumenisiroxi.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/svdko07uq3far410i4tr3de2ds/71908807551.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a24a6155c---50147575684.pdf
    • http://waukeganeast1980.com/clients/877304/File/tekomijobazagajisewezidi.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ba51cfd79---69633657005.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/9447defd441060dc51ab4652128bb031/jogozevomedanav.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f46cb054226305c922e7263f5713f63a/loseretefisojaluduvag.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a22dafdce---kulowilubedirurane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbeb.bin
a9b531c6f8f7c62e8519c21bd67d6bd9855f89f997f29cef6e6b37409edbd7eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 5644 bytes
font_01_sfnt_off00010f20.bin
de49032457093c19ce9f6c3c136aa154f2ad474533193a1dc10c706025d98567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F20 12188 bytes

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