Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67cae7c95d2a5d0…

MALICIOUS

PDF

85.1 KB Created: 2021-09-06 23:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0a29f501addcd289854e29201c11aa84 SHA-1: feb40078b94aaa59f754e74d328339077ac11df9 SHA-256: a67cae7c95d2a5d0b9c7aeded04b40706078ed68771f3ec93f132e06d34c05f3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of these links suggests an attempt to lure users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5823

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fae311a742---53619463072.pdf In PDF document text
    • http://penzionriverside.cz/files/file/wurumefujewudujiv.pdfIn PDF document text
    • http://skncn.com/u/files/zekaro.pdfIn PDF document text
    • http://casaalu.com/luutru/files/pulinilejozilokeraw.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/094dd9f435b6b3d2c3f8fcceb1129b01/vojawopejevola.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/talopofakedusitagebot.pdfIn PDF document text
    • http://garderoba.sk/images/_file/jinabolikumewukakikexa.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/palasugigilogomapiju.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/losudutumuwuzuwip.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d6fe900ae---8590633278.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/pajaj.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5eja9ni88e3bmcsubgtt655e1h/29851739593.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/vawilim.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/96936568901.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/84193282398.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/fitusumuguziwawabijap.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/lolebopipuropolix.pdfIn PDF document text
    • http://crm333.com/documentos/file/pevefesemogok.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/49e3545f6cb4821e29ebb3d9c05a4568/62634118335.pdfIn PDF document text
    • https://avenue102.com/uploads/file/norowi.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/fvo14a55udfvasd416s4iqalbq/ximufikaxigakopiko.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/26547566541.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/83212046943.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ngl6ao25ice3m3c6f7hlo6djlc/dafewipoguxolivogutidagix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=lg+ericsson+aria+phone+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAD 10780 bytes
SHA-256: 6ebbe69484cf1cdd04f233eb2372909f27daa5ddc9ad66fb279fd32edb795fe3

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