Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f91e9ec5558ffa…

MALICIOUS

PDF

83.4 KB Created: 2021-03-17 05:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c95e5ccfd07521c4257129c48d7d6de7 SHA-1: 5e9866bc714e0b44e453cd209617cbd8c3893444 SHA-256: 06f91e9ec5558ffa3ba57eb73d845ecba234b72d6a5eab43ed8a51b4915f80e5
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=how+to+get+wwf+no+mercy+mods PDF link annotation
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/lasuvikemozenavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454045/normal_602fd6115f74a.pdfIn PDF document text
    • https://zazatetapez.weebly.com/uploads/1/3/0/7/130739704/2363402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426541/normal_602d3b57a4622.pdfIn PDF document text
    • https://kivobuduzuv.weebly.com/uploads/1/3/0/7/130739084/refikober.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/7697904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488141/normal_6011ad566a05d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_600a5dce52c6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_6016c1a1dc2d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42650218-3fd3-436d-b394-2ecce897a04b/28608240029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/910e2ea0-7d36-48a0-930d-9e1a7b68d0a8/mefuwudireduwokubamur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f82867b-3faa-447c-b9a5-d003f7cdf62c/jonutofipurefikogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad261a3c-ab3e-4f10-abfb-9776c5b983f4/napetuvesenujatepimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d72d5e2-4780-458f-abd1-87fa0d9429e4/thermo_king_apu_codes.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/all_in_one_epson_printer_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9978d2-f156-470e-b7e1-1289a5cbe105/sojatiwodazigumasoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e063b8-8e68-42ea-996f-f61736eca618/60661829493.pdfIn PDF document text
    • http://jexalajepufuxin.rf.gd/adobe_acrobat_pro_dc_freezes_when_opening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90681881-6172-44f6-92b8-b0f9169a24ca/adobe_premiere_rush_pros_and_cons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38185a57-e19c-4a60-ac02-8ac60b240074/15426272488.pdfIn PDF document text
    • http://kovobopejuwego.rf.gd/how_much_do_first_officer_pilots_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c264fbaf-b52d-4638-8cf7-927a29245bf6/what_is_the_best_powder_scale_for_reloading.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_off000108c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C2 5252 bytes
SHA-256: 16d1343b69bd8ef53bdc7ac37cea01f4d71ff1aed1a8201c2d45f5886b7ce777
font_01_sfnt_off00011ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB1 11012 bytes
SHA-256: ca54764a588cdb6270536e7d79c184f28c673d9dc8cbc42febf05c81f5b00d0a