Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b84097b297902e…

MALICIOUS

PDF

84.8 KB Created: 2021-06-20 14:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: fa324b06ddf507d84c36d97ed6622ca8 SHA-1: 36f0f18e34a9246650b9ee9c99e245a3ab1d2fbe SHA-256: 74b84097b297902ef0e449d6d853cec8e15a017399671dd66b2936bc11318d62
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised CMS uploads, suggesting a link farm designed to distribute malware. The document body, though heavily obfuscated, contains references to 'a quiet place streaming full movie', indicating a lure to entice users to click on malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/12c1a14feb33c972243b3eee24d04804/65905886591.pdf In PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90fe30c0c1---ridawimejopor.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202105271219565863.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b375590d457---51710994499.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/58540626073.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160c7355472cc4---nibapavanikupimizilopuvir.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/2476710257.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/sejavataset.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0af176b4c507af91938eae28a419a056/67533648388.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/c74c6eb7d65c72893c5ba5054e3f3285/24597093153.pdfIn PDF document text
    • http://mousike.it/img_ins/files/80503912534.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c95c85e12---surepiluxefurolomore.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c976b1d21ab---wojonurefamomebug.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/67821270653.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/56499864250.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cad7b35ce9---84702687688.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
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=a+quiet+place+streaming+full+moviePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/177a4ab266029c8e15db92fdae561c81/muxolatibiwujufifetabi.pdfIn 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_off0001001d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001D 5392 bytes
SHA-256: d61974a429bffbaf39f0032d007d233d31d76f4b8111e6985a681d9c1d807153
font_01_sfnt_off00011261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 10688 bytes
SHA-256: a305dd61e1087cdb8926ccbd2c151538ea52043a1c52bf0d0868e745a59826b5
font_02_sfnt_off0001369b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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