Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0258a59c511f6e…

MALICIOUS

PDF

81.7 KB Created: 2021-02-26 21:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7077a9b479ff1b49b2586c10221e0750 SHA-1: 65b8598139eada43c5d821f7ed1fe3f3beba0b8d SHA-256: eb0258a59c511f6e20287f87bd14ab2b042030715908ae3c9c11d8b2fe96b1e2
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristic detections indicating it is a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The document body, though partially obfuscated, references "The raven by edgar allan poe paraphrase", which appears to be a lure to disguise the malicious nature of the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=the+raven+by+edgar+allan+poe+paraphrase PDF link annotation
    • https://numurivigafezu.weebly.com/uploads/1/3/4/3/134390613/viranawiwob-limesur-dixewilawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_5fdc3d745c329.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/1229710421f3nwq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499979/normal_5fce741ea3cf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419424/normal_5fef18c756645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_60364d03c39e6.pdfIn PDF document text
    • http://braco.ru/805764163458gru7.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
    • https://s3.amazonaws.com/muvarelo/martin_lutero_95_tesis_resumen.pdfIn PDF document text
    • http://tinipukax.epizy.com/ielts_listening_answer_sheet_2018.pdfIn PDF document text
    • http://desetezovadu.epizy.com/arduino_ide_link.pdfIn PDF document text
    • http://nafakosoleg.epizy.com/21798853955.pdfIn PDF document text
    • http://midunugisevu.rf.gd/fujekafekumewirap.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/24416734711.pdfIn PDF document text
    • http://xufutat.epizy.com/madedurexiwijarelikop.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C9 5132 bytes
SHA-256: cb3fe00995709e9f37248f75be5c872f494b7071d1f138b79db382fd8c52841c
font_01_sfnt_off00010829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 10376 bytes
SHA-256: 033842b0153c1cf58cd16d6a71de8f7209e8eb83c34be650bbe49a64db430d7d
font_02_sfnt_off00012b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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