Malicious PDF — malware analysis report

Static analysis result for SHA-256 366ebc77d17257fa…

MALICIOUS

PDF

75.1 KB Created: 2021-03-24 15:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53a1a26804a2da97e5818cf1a9d018c0 SHA-1: 5f1a51d139f1a4351d91a1d2ccf8f4e01e93ce38 SHA-256: 366ebc77d17257fa35bfb024e110d9b8bf20cfe01c41c22dc2230cc6448834d3
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious content.

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://jacksth.ru/wix?keyword=albion+online+apk+mod
    • https://cdn.sqhk.co/fogibadeku/gdjhiiJ/glitch_video_effects_online.pdf
    • https://static.s123-cdn-static.com/uploads/4492918/normal_5fe29454b67d8.pdf
    • http://italywow.info/kitchenaid_mixer_k5ss_repair_manualy1bki.pdf
    • https://cdn-cms.f-static.net/uploads/4375073/normal_6035e3f3bfce0.pdf
    • http://rowewuxeg.getenjoyment.net/83758091563.pdf
    • http://pifedalune.medianewsonline.com/placental_retention.pdf
    • https://static.s123-cdn-static.com/uploads/4490724/normal_5ff577a4b70be.pdf
    • https://cdn.sqhk.co/noneniwetav/UjaiGji/59857440698.pdf
    • http://lebuvowune.getenjoyment.net/50920127378.pdf
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5fe2419423b22.pdf
    • http://usacreditmonitoring.info/9580556839fxgn2.pdf
    • https://cdn.sqhk.co/temazajilib/jjfjiha/fly_away_birdie_come_back_birdie.pdf
    • https://cdn.sqhk.co/miwataxanis/igjd3ij/37892317496.pdf
    • http://sallely.xyz/9565126198653bjk.pdf
    • http://waferaboteb.mypressonline.com/30963744620.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dapibudajemuk.atwebpages.com/sawewipid.pdf
    • https://uploads.strikinglycdn.com/files/3b7e9f2b-a090-4e2b-a40d-476b934c9c6b/mijajagusigamawologozuwij.pdf
    • https://uploads.strikinglycdn.com/files/acd0c286-f121-400a-bd25-82469c036dd2/2004_ford_focus_alternator_not_charging.pdf
    • https://uploads.strikinglycdn.com/files/bea89798-41c5-4b49-8845-e6f5b4acd480/star_trek_discovery_episodes_recap.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_off0000ebb2.bin
0beba55a0d22aa006c39899a2931a5e54dcf00656d9c620ff1fea04d0e5d8afb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 5024 bytes
font_01_sfnt_off0000fcb4.bin
ef66e24983c2a45aebbc6e573bc256d2734c5bc227e1a60aa76490f25d8957c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 10148 bytes

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