Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09714968fe28d8d…

MALICIOUS

PDF

73.5 KB Created: 2021-01-23 01:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e0dcbabe521bcc712d94f5fae393edab SHA-1: e3ebd1269c4f48959f3b8b94b1e38529e975d06b SHA-256: d09714968fe28d8d3a0c17fb5f9dce6fa2add8f5961637feb2a8921581b303b0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and Weebly-hosted PDFs, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the document's purpose is to direct users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=checkers+old+munchen PDF link annotation
    • https://redojakora.weebly.com/uploads/1/3/2/6/132682723/zapid.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/hfMjeif/marketing_plan_steps_kotler.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/1927103.pdfIn PDF document text
    • https://rixexumig.weebly.com/uploads/1/3/2/6/132681576/fatimekokamov.pdfIn PDF document text
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/kaxivajinawabez.pdfIn PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/robebasomabevew-puxofof-risaxi.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/4be58260d269.pdfIn PDF document text
    • https://tatedugede.weebly.com/uploads/1/3/4/3/134311852/kikexudesavanux_pukogujujejadok_jebolutiguwito.pdfIn PDF document text
    • https://kufibewiti.weebly.com/uploads/1/3/1/4/131406300/furetuwuzevulaf.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/kozewuposoridil/animation-_list_android_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/first_amended_complaint_form.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/bounce_tales_adventure_mod_apk_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/nikawexiposafasujelufezet.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/96274782143.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/39763076287.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/expanded_polystyrene_sheets_in_chennai.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_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 4936 bytes
SHA-256: 36ac427baad05742acca602b82a08a4c3b5fa2f42de9a1b534810359008cd780
font_01_sfnt_off0000f4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 10716 bytes
SHA-256: 9277e5ebfec66351effdfa0c3c0ef67f990c533e7e63a54a3c447152e6875198

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