Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9a729a3e9e8567…

MALICIOUS

PDF

83.0 KB Created: 2021-03-19 12:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 07d0dbdbb9076807da28fce7ecb4def4 SHA-1: 542b89341d949fc3657299f533a76abf19819684 SHA-256: eb9a729a3e9e856739d885010eb3d61bdb4002986f1d1e79c40be4ffc3b2f017
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/wix?keyword=mhw+a+visitor+from+another+world+kulu PDF link annotation
    • https://xiwulugizasu.weebly.com/uploads/1/3/2/7/132741433/8170102.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/best_books_for_gmat_preparation_2020.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/kigawedorusaxir.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/dimonabolisepi_jixefozamivoful.pdfIn PDF document text
    • http://paselon.getenjoyment.net/classification_of_anti_tuberculosis_drugs.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/alesis_3630_compressor_manual.pdfIn PDF document text
    • https://zexiditituluw.weebly.com/uploads/1/3/4/7/134734655/dewivejebutomoleru.pdfIn PDF document text
    • https://vomudata.weebly.com/uploads/1/3/2/7/132740307/tijenita-vurepetudosak.pdfIn PDF document text
    • https://tavasosezirom.weebly.com/uploads/1/3/4/7/134768566/fcde1e.pdfIn PDF document text
    • https://nadaroxiwe.weebly.com/uploads/1/3/4/6/134688146/2cd25687d79c.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/cvgN9hq/dominations_calling_wow.pdfIn PDF document text
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/kijedu-posapifet-pafat-mamate.pdfIn PDF document text
    • http://netekepipavosis.sportsontheweb.net/35404394613.pdfIn PDF document text
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/1755148.pdfIn PDF document text
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/0d76e01fc56.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/gjdt3kz/nopeduruvijijisefisugog.pdfIn PDF document text
    • https://deserekinubolid.weebly.com/uploads/1/3/4/3/134319780/titevo-gekakawuz-biwurukoxusogef.pdfIn PDF document text
    • https://sevafunen.weebly.com/uploads/1/3/4/5/134588772/rumezifanibujepa.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/fowikorejodi/cours_anglais_seconde.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/47437644557.pdfIn PDF document text
    • http://wokidomogu.onlinewebshop.net/achtung_panzer_english.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 5368 bytes
SHA-256: 4dc288e8e85e8342ec13e51436a05e18cccfdd38b3e93e63a6eb8c99ee71fd79
font_01_sfnt_off000102d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D8 11220 bytes
SHA-256: 831b2b19f36188ef00be496cb691fa58168c11f2f62c19385159d41d95ba1cde
font_02_sfnt_off000128f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F8 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67