Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd98736c8683790…

MALICIOUS

PDF

153.2 KB Created: 2021-06-10 11:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: faadbaa9956e5e1c5bd46cce6e44a911 SHA-1: fd8072b2fd0bd7880db91b1339cfb09939414944 SHA-256: 1fd98736c86837901ccd2a89cf2dd5d2bdddaf3164777cc3a31ec6c05f21c74d
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or link-farming campaign. The embedded URLs are designed to redirect users to potentially malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • 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://catamma.ru/uplcv?utm_term=programmer+aptitude+test+ikm PDF link annotation
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/nohb83s49nd4369oqfdmrvsjvk/baxip.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/74419429006.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/29379233666.pdfIn PDF document text
    • https://bataretak.com/img/files/file/kefanomu.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077cab2bb4bb---giwotapiri.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/4hegltbk3o1a4vfojmu8af1lte/jewirodulikamojejekudike.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/soviwepunuxiwi.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/pisifutipemimezapolud.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/midikowamimokadebilamib.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/ad2e8fab676813e334bb418d5d1114da/43573134251.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d11661b91c---24603153393.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c08d148b68e---sanezilitadumagarudagiruw.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c17f00aeca2---11128515902.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160824f1f3e5fc---96373544163.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/dhtfl42i6tv76hadi53eonpali/30949656244.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/60048177228.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/mm5jlgpshgoesio3gj2g2u4q06/xevebevizaworofuzabil.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087b8f18ad49---kewunirobiramarixes.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000207a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207A5 3612 bytes
SHA-256: 3573eafd31c1906a2d841e8383e76630ab801fdac3c685f3c9cfb4f4fee2cda5
font_01_sfnt_off00021489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21489 5312 bytes
SHA-256: 736c23cf90c9f1c21cb0b85358b6ac2739b2bae58fddc93a5d31bcbf4b11be07
font_02_sfnt_off00022685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22685 15272 bytes
SHA-256: 220262d4208ed5b734994ccf3836e32ec42adcfc67ef45dd1735889326d48da2

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