Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa82dfd50b96fcb9…

MALICIOUS

PDF

69.3 KB Created: 2021-02-17 10:15:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 269dabd86ca125856d753020430005fa SHA-1: e4a2aff175f7e17863c700a2fee827767852b8c1 SHA-256: fa82dfd50b96fcb93aa97b77b49604b004caacdca5e558980212c3b3ccd04a96
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one prominent link pointing to 'seumenha.ru'. This URL, combined with the 'PDF_SEO_LINK_FARM' heuristic, suggests a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://seumenha.ru/strik?utm_term=louis+l%2527amour+sacketts+in+order PDF link annotation
    • https://temabodanifow.weebly.com/uploads/1/3/1/4/131454916/xibarodap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_5fd0a1db49742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484365/normal_5ffe86949d083.pdfIn PDF document text
    • http://togurebuk.66ghz.com/pastest_mrcs_revision_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471686/normal_602520bcf116c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_602c16782faee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481403/normal_5ff8c53b1ea24.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/tirimofufemukat/australian_refund_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/fukoboromezagudil.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/canberra_tv_guide_wednesday_night.pdfIn PDF document text
    • http://ribowiga.epizy.com/fur_elise_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/jipituzajufagot.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/basketball_stars_mod_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/90475894168.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/free_business_card_and_letterhead_template.pdfIn PDF document text
    • http://vudajerex.rf.gd/63601414069.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_off0000d2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 5124 bytes
SHA-256: b0ac33e1cda7a3142c716604998682b83b328240cd814f417f35e90ce33bec06
font_01_sfnt_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 10492 bytes
SHA-256: 43b4271833b9d8810f78ecddab3ab8f1835cfe591d29360cd4b48572eac982f7

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