Malicious PDF — malware analysis report

Static analysis result for SHA-256 352be85395c89bf5…

MALICIOUS

PDF

74.8 KB Created: 2021-02-26 00:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f31bbf287f1b7ba7f33a2e7c05a51a20 SHA-1: aa88519cd42d9fa444e85d21616a3371ea5a02a7 SHA-256: 352be85395c89bf50306b9d57032714adec40823d19b1db99e31c019bf3b1aaf
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to printer setup, likely a lure to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/award?keyword=how+to+connect+xpress+c460fw+to+wifi PDF link annotation
    • https://kodopikowi.weebly.com/uploads/1/3/4/6/134659436/jevojofonepisar.pdfIn PDF document text
    • https://fifabazu.weebly.com/uploads/1/3/4/7/134702458/rejabele.pdfIn PDF document text
    • https://roralolew.weebly.com/uploads/1/3/0/7/130775143/ffb4f73b7f390.pdfIn PDF document text
    • https://fibadajemuda.weebly.com/uploads/1/3/2/3/132303382/d70313b197.pdfIn PDF document text
    • https://biwoponafi.weebly.com/uploads/1/3/4/7/134767969/2633981.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/gjAgfii/daladigiwiwevujed.pdfIn PDF document text
    • http://pe50off.pro/najizizedoferexuwdriwc.pdfIn PDF document text
    • https://cdn.sqhk.co/jomutepe/ggAEhiW/21384299354.pdfIn PDF document text
    • https://jatevabuxises.weebly.com/uploads/1/3/5/3/135382810/844dce33d0.pdfIn PDF document text
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/karevupijovepi-sagof.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/809e3da62.pdfIn PDF document text
    • http://wrinklestiltskin.com/fusujivawikelisdrk3f.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/iiqJTig/idle_fishing_master.pdfIn PDF document text
    • http://gmetry.online/force_360_face_shieldsgg0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tagozenumuzem.rf.gd/nerewuxoburu.pdfIn PDF document text
    • http://makuwuwamev.rf.gd/98625710341.pdfIn PDF document text
    • http://lewupidofiji.epizy.com/lipid_guidelines_summary.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 5060 bytes
SHA-256: 92d6f05dd73b8eff11d13daa5896c056488006444d00978469d6e1fd6df91d4e
font_01_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10240 bytes
SHA-256: 79a9d506d093e1ef3649e0c82cfb7dca78eaede9d15b45ebe01b3a53af16ff0e
font_02_sfnt_off00011011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11011 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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