Malicious PDF — malware analysis report

Static analysis result for SHA-256 271c018e295379dd…

MALICIOUS

PDF

87.0 KB Created: 2021-07-20 00:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8fa6567595355b502a59fc00f98407a7 SHA-1: bb28d7c2c72594e24b5b3566872deb5c00e9c7e2 SHA-256: 271c018e295379dd5c4e8c597400fce0664800f5507f3a471f03a5eee0e595cd
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the nature of the heuristics indicate a phishing or SEO poisoning attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://haiphongcontest.com/images/files/45323345701.pdf In PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0eaadd4c2---kivavimiguzatamutet.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/gutolurirotebu.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ac1b7532c9ac1336188dcaadbaaebe9f/falikatunijojav.pdfIn PDF document text
    • http://cooper1972.com/clients/b/b4/b451ebb09e7e0345645526f893d9a49e/File/13871176146.pdfIn PDF document text
    • http://adveotec.com/img/file/dagefapexonoxefebe.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/2ou9j62j6tt38b2qm2qqtlhgdf/47821916447.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/a77m3i9ofsusoe2ibfkgel05o5/20813811732.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/99428574960.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/nofuxefagoxujikoxiro.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/47305853142.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/befujud.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fda2c50b8---tejizemorewisaragofuwulul.pdfIn PDF document text
    • https://mfdesign.hu/files/file/tidifaxujep.pdfIn PDF document text
    • https://airshow-bg.com/file/dosapizemuvekab.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d663b586a---28475892171.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a13170a3ec4---luluk.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/repoporijig.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bedd2ea11f---nalejukutugokalaji.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/53652414482.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/9pv4uhtk5kbfrj0leg0ld5qhof/81733219547.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/koxumunur.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/d7ca6748e6cc82eea0720ea8b6d181b1/49321501438.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+do+you+get+out+of+a+boat+in+minecraft+pcPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 17420 bytes
SHA-256: af483f68cee908594372e7c9487f070e41a3dcd15a752e02f11a363890f1bc7f
font_01_sfnt_off00011af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF3 11180 bytes
SHA-256: 2204054a16fbe093f65b49df55e1429ea1e05d6ca07ed6ce4a1f6c63a6e7cbf5
font_02_sfnt_off000134b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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