Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d46c2a483d351d…

MALICIOUS

PDF

73.2 KB Created: 2021-01-14 12:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baea681f269678b218cb684bad5cbbdc SHA-1: ba178e85453124ec70a629e6b0031ac68723ae76 SHA-256: 22d46c2a483d351dd11f205ceb94fea5c54308159c349146c7a3eacbe310a5f0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to disposable hosting and link farms, indicating a likely attempt to redirect users to malicious sites. No scripts were extracted, but the structure and URL distribution strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/aws?utm_term=minority+report+trailer+2002
    • https://site-1167954.mozfiles.com/files/1167954/cosmos_quest_the_origin_wiki.pdf
    • https://site-1177546.mozfiles.com/files/1177546/82412979895.pdf
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f875ddd27441.pdf
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/vimimijidife.pdf
    • https://vodoxakitukep.weebly.com/uploads/1/3/4/3/134335140/denugijopogejuz_lexesuxijewavos_pamivusozu_jesuvinotasa.pdf
    • https://vumuzasal.weebly.com/uploads/1/3/4/5/134586685/gikukumatekatapup.pdf
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fefb5456ec1d.pdf
    • https://cdn.sqhk.co/potiribuwuf/ieSNXmz/freshwater_aquarium_fish_for_sale_philippines.pdf
    • https://pixasowurixes.weebly.com/uploads/1/3/4/9/134904492/kerekisek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tonisefoteka/92030403241.pdf
    • https://s3.amazonaws.com/mutirexa/apis_mellifera_scutellata.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2de.bin
e433a9122f32c3952f5163f13dbbd714f5ee323add0ff865abefd3f39e4171ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DE 4804 bytes
font_01_sfnt_off0000e33b.bin
7ca3d01fc50745cad41e36f4093e412bd7a88d40182797fb81a333694d946512		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE33B 10948 bytes
font_02_sfnt_off00010897.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10897 4324 bytes

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