Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47632bf961fee8a…

MALICIOUS

PDF

76.8 KB Created: 2021-03-26 10:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 513b3be5fb3d725b9b769dd426239521 SHA-1: ecf62845df9e65d076ee5e38afa01b95ea32f8ca SHA-256: e47632bf961fee8a1bdcb5588d974d596f664f3c7b1996c6033cc186cda18683
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to 'seumenha.ru/award', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://seumenha.ru/award?keyword=robe+sewing+pattern+pdf PDF link annotation
    • https://cdn.sqhk.co/vugomupuzisa/gj2ZEne/rumugute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_5fd7bd04eefd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_6032c9e6dcf87.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/ejdJCNB/64092039430.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/edGpk2O/47739988478.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/hggf7hh/6557242363.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/xedewofuretujo/burulutabalimona.pdfIn PDF document text
    • http://mikafametulere.epizy.com/android_phone_charger_port_type.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_0dfabf44b5d245f2a24e17c72e102e2c.pdf?index=trueIn PDF document text
    • http://benosubageratiw.epizy.com/pikewubiripimekikirebutas.pdfIn PDF document text
    • http://xajovezosesazu.epizy.com/modokig.pdfIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_6f4ebaf4ba8c4b31a293eaca722808a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogeguva/914894584.pdfIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_0e749b6acd4a4f3a925604f730f2a830.pdf?index=trueIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_e5c0392112ce484cac9e53eec39bae3b.pdf?index=trueIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_8302503ec68e40b5a882627e531f3920.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firudegix/27122359349.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_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 5416 bytes
SHA-256: e24ee4da43f9533797d42bff17b2fe921da784693aed5c8787e075e43942d1c1
font_01_sfnt_off000101ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101ED 10576 bytes
SHA-256: ba3c8ef9be5644922537913abaab56df032758047f11aebde0b1489efa935fc3

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