Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f01edbbeada8145…

MALICIOUS

PDF

77.1 KB Created: 2021-05-09 15:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: eba93b7b64bedfe31605d5739a7a1ec5 SHA-1: 44384bc31802bad4d6096851e71c07316724d0e0 SHA-256: 1f01edbbeada8145a85555a3bc72058c029f9643a0721fb2b3542e730546d71d
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, characteristic of a link farm used to distribute phishing or scam content. The presence of embedded URLs further supports this, suggesting the document is designed to lure users to malicious sites.

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
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=egypt+flower+of+life+meaning PDF link annotation
    • http://rimarilomikozu.medianewsonline.com/winoninipazevutakuluv.pdfIn PDF document text
    • http://wudenufodoroziv.scienceontheweb.net/list_of_important_days_in.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_6024b534542de.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/can_i_watch_netflix_on_my_panasonic_viera_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448727/normal_6006fe062919a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_604e6fd34edeb.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/12790621408.pdfIn PDF document text
    • http://creditscoretracking.info/budget_2018_summary_vision_iasjywt1.pdfIn PDF document text
    • http://shopbest.online/fozesivajogejaao9c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_ec6b8f3c49df4f87846838f56bd95834.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_be7081b3a86e439a925937fd502993a3.pdf?index=trueIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_2f5579288b3048b59ab1944ae57c9cbb.pdf?index=trueIn PDF document text
    • http://luzojora.atwebpages.com/ic_555_as_astable_multivibrator.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_6ed40b9dce064c6c96204443f2207542.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fopalew/best_epilator_reviews_consumer_reports.pdfIn PDF document text
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_83dbe1d0fd0544899706dc9ffc20c119.pdf?index=trueIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_129920b2fb7c4fbbaab14f0700dd26db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lepefi/rezasodek.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_off0000f0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DC 5192 bytes
SHA-256: a4767ed49104b8cbb063525d20591164987a5a251ad862943b9cf988f03b2680
font_01_sfnt_off00010298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 10636 bytes
SHA-256: faa21be8690bf77dd219d3f6bdabf125e67997265d16399d1f48c906fe3acbe6

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