Malicious PDF — malware analysis report

Static analysis result for SHA-256 afff841c387b0ec1…

MALICIOUS

PDF

77.0 KB Created: 2021-06-09 00:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5f703ee648f02254b61a136b1431954 SHA-1: fe7ca2e9b9afa391a3458a6992c1fb5e466f0e78 SHA-256: afff841c387b0ec1e5a236acaab09900afbcb097df3d6c6e11f0f446bd79ef76
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious files or phish users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to host these links on potentially untrustworthy or compromised infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent.

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=mario+kart+wii+rom+europe
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/7f2883dd2be2d28532db99b37057575f/lonelusujuvipigomewepo.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5c4bbcfa1---88464517557.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ef2ad05b0---bajelexuwipekus.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c741456f1---82155925835.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/b02jlt21jdte1kvf0p090e7ba2/48340851467.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9135c2b0a---wegumusolorup.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e7a6c9ffb---68446477726.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/2icpg9277t9r2gsdrc1p9rj6gk/73141923988.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/9fadfe1eba491c8c0d386139fe07a84d/rusatem.pdf
    • http://ayurvedicclinic.org/userfiles/file/96753788677.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c0edde7531bc5a5e52a4ef04f5dfb867/lasokixisimijemugawesiwos.pdf
    • https://cgeminfos.ma/upload/file/minezis.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609abe257bc25---pobuzepuwu.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16092f876aa973---31761777170.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607248f1bf9be---boridemidemezavo.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ae824416094301addf756eb9fa29e0da/kevigulugajulibibuvadala.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608a93a4b5757---99563127181.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_off0000f266.bin
3bacebbb08ff7d0d24efdda42da772014c7d1a8d0a9c3f51790040f40218db7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 4916 bytes
font_01_sfnt_off0001032a.bin
f2e952da9c84e1d309170c345548ce4f0d22b30650a6d03dae48667ab4a36217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 10484 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.