Malicious PDF — malware analysis report

Static analysis result for SHA-256 184fce8326354a72…

MALICIOUS

PDF

144.7 KB Created: 2021-04-10 04:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24e2727c46d657710e8fec0ec76d4bfe SHA-1: 6b9e6448345fcf7c9f57105b9ec155af9dc938a7 SHA-256: 184fce8326354a72aa9860d55f74520e59e830b59ac7c6700df5341380d66dbc
226 Risk Score

Malware Insights

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

This PDF document is identified as a malicious advance-fee scam, likely distributed as a spearphishing attachment. It contains a large number of external links, many hosted on disposable domains, designed to redirect users to scam content. The ML classifier and ClamAV detection strongly indicate malicious intent, and the document structure aligns with typical lottery or prize notification lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://midufefew.ru/strik?utm_term=most+popular+ballads+2020
    • http://you-bestshop.xyz/95803463063hfyd4.pdf
    • https://cdn-cms.f-static.net/uploads/4444657/normal_60352adf3de03.pdf
    • https://susokeruno.weebly.com/uploads/1/3/4/6/134656617/sejinewaxolegofori.pdf
    • https://cdn-cms.f-static.net/uploads/4458161/normal_5fd661ab8eb26.pdf
    • https://gutakabumediru.weebly.com/uploads/1/3/4/4/134492877/gipunoxunelaja.pdf
    • http://gufutaca3.xyz/lazejopofarizegonuzexulujqj3ay.pdf
    • http://yourlivehelp.com/5807049792alg6e.pdf
    • https://cdn-cms.f-static.net/uploads/4421959/normal_604137c9c35bb.pdf
    • http://granitmetrospecstroy.ru/life_fitness_9500hr_cross_trainer_battery9srh4.pdf
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/3883466.pdf
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/givunap_vunotobuvigonik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_913c7cb5fa8e46da9861ea14300d9ed8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/594bc98f-8932-4c68-b84b-1e3a0170db38/99328472606.pdf
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_a1ce04fd0b8443ceabc901d9fcfb9a1d.pdf?index=true
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_52c1e510bc534afcb343b2aa32c8afd0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ee635dff-7c77-430d-bcff-8f0059cb6669/fasatukufefisumawuperawek.pdf
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_076c57d5af0540d68f3f118a79c731ba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/625b2d15-f17a-4744-a9d6-58f3efe255b3/11802252174.pdf
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_e34d864d3ec448f89757251531c729cb.pdf?index=true
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_3bc6add231234963b8168df4d46a5c60.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3af4f374-ff1c-4828-9d9e-d3f262619cef/62414215555.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f89d.bin
22d646c209ed73612d88c89832a6710c4b398521772bb163f250fbb1f624954c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F89D 5372 bytes
font_01_sfnt_off00020af0.bin
92c613ec9afa082172ef40a247052fb911bdf7b64d6739b8338dd85e36744110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20AF0 12384 bytes

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