Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a676f7d17afa11…

MALICIOUS

PDF

77.5 KB Created: 2021-02-28 12:17:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7561c608740a9927bf400ab7b826253b SHA-1: 9ba06cb5275696c42b0fab69c257aac4c555889a SHA-256: 12a676f7d17afa11d5df520df215f1389e7d6fbe5661fa95bf264fdd07597173
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs, including suspicious ones like 'ponafet.ru', points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=sap+inbound+delivery+handling+unit+table PDF link annotation
    • https://pakulokopujaf.weebly.com/uploads/1/3/5/3/135389458/sitemesevevelapifa.pdfIn PDF document text
    • https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/63aed29c635d.pdfIn PDF document text
    • http://extraterrestrials.space/coventry_university_online_enrolment_guidesn81n.pdfIn PDF document text
    • http://axecheat8.xyz/best_first_person_shooting_games_for_switchqeaee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445735/normal_5ff663c2dd922.pdfIn PDF document text
    • http://ketousa.site/sugevopakexikr3hhv.pdfIn PDF document text
    • https://mevinabepoke.weebly.com/uploads/1/3/2/7/132740553/130c55a833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_60064ac9a0af0.pdfIn PDF document text
    • https://belonimilulufaf.weebly.com/uploads/1/3/4/4/134403367/1716664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450417/normal_5fe39f61a2944.pdfIn PDF document text
    • http://ital-tess.space/30479079777jbtir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/zasapogasabuvetowoforede.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/kung_fu_panda_3_li_shan_and_po.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/construction_job_cost_sheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/xopakezenaxivat.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/amorphous_materials_plastic_deformation.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/zujozijevonusapurajup.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/turtle_beach_x12_xbox_one_mic_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/warrant_canary_transparency_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/58962216012.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/42681129420.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/jirijenoguxojagegumisux.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 5448 bytes
SHA-256: e621ce9a0d1ae6c41d34b199a57336c0160495ca186cb8b47bc7518cdb9369b8
font_01_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 10808 bytes
SHA-256: 20695dc353d65efe95c478b805a0ffab1958675acd84f522220590601bd65889

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