Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e32392b37826684…

MALICIOUS

PDF

75.3 KB Created: 2021-02-27 10:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9e27662f596385e537c38d925c3add9f SHA-1: 22014f0ae09deb50d7fd07690db7bb823b6f04eb SHA-256: 6e32392b3782668425b12320690e5990739cec1c1a14098d11c0e5f631a94181
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for distributing further malicious content or phishing attempts. The document body, though heavily obfuscated, suggests a lure related to educational materials, aligning with common phishing tactics.

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://bologen.ru/strik?utm_term=glencoe+mcgraw+hill+answer+key+math+algebra+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481510/normal_602b69582d60e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_5fd657a90a1de.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/bamawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460725/normal_5fcbd52b3533e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417222/normal_602027d4f1230.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416140/normal_600382f45f2af.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/volej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408464/normal_6027c3f288dac.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/jozevuvuvif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fcb5e5e82eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452148/normal_60113f661c8bc.pdfIn PDF document text
    • http://manaxupupili.iblogger.org/excelsior_springs_missouri_weather.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530937/normal_6007932a4b75d.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/fomezakilexaberu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5fde4113a025f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwedilejom.myartsonline.com/gupugipemitopum.pdfIn PDF document text
    • http://tewejifofobaj.rf.gd/gerrymandering_worksheet_answer.pdfIn PDF document text
    • http://suzibebozodumi.epizy.com/cutover_plan_template.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/turakomelizeg.pdfIn PDF document text
    • http://pabovabavuwemet.rf.gd/nikezitasanevoxevijutu.pdfIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/22396160987.pdfIn PDF document text
    • http://nedajazamofo.epizy.com/90965103720.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 5692 bytes
SHA-256: edd54be5ab03b2e00960f3e7c9931ccf00faf5e2cca777b3ac4a50bfb64b3c5d
font_01_sfnt_off0000fb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB07 10204 bytes
SHA-256: c4ebc84f8754b0757218ef2f40cb8e18b3c23c397e680a423109d23cea19bf54

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