Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e31e0ebe2dd8b28…

MALICIOUS

PDF

75.6 KB Created: 2021-03-20 13:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9fc9c206ab5971464f59178c141f00ac SHA-1: baa8d258dfe25ce0121512a627458f14207f8774 SHA-256: 2e31e0ebe2dd8b2858fdedd7f288b8bde7ad63173966dae089ab24eeb012f33b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to 'tenant lease agreement' and 'pdf', suggesting a lure to trick users into interacting with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/award?keyword=tenant+lease+agreement+pdf PDF link annotation
    • http://winsbig.space/james_bond_movies_in_hindi_dubbed_download_480pb3nq4.pdfIn PDF document text
    • http://badoxik.scienceontheweb.net/xitomemunojuvid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_601f248d10d3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367297/normal_5fe1c3cfec997.pdfIn PDF document text
    • http://luxshop21.site/clinical_practice_guidelines_contact_dermatitiswk77t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5fda28dd058d7.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/febi_bilstein_catalog.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/ccna_voice_training.pdfIn PDF document text
    • http://circulyarkadigital.xyz/89668198224gqcex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451210/normal_5fcf1534e7a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462046/normal_60230d336b07a.pdfIn PDF document text
    • http://masirudukumope.iblogger.org/bolewafexobozonir.pdfIn PDF document text
    • http://pearhaidhr.fun/muzonuwotigirosa67bew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483083/normal_5fc7507da8446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozidijapepore.atwebpages.com/xedebafufo.pdfIn PDF document text
    • http://mekidojakad.rf.gd/google_sheets_translate_gif.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_0f5d8e32a18143ffacfb094e148b135b.pdf?index=trueIn PDF document text
    • http://molobexe.rf.gd/76804865605.pdfIn PDF document text
    • http://tuguxukoz.epizy.com/is_onenote_free_for_business.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_02403734b8164a739dadd1fb2a172811.pdf?index=trueIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_d0ab76424cf640509b4ee507d3879d38.pdf?index=trueIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_36372b7039fa4047823cce4b51ddde94.pdf?index=trueIn PDF document text
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_c2d93aeb9b3145029bba17646f117c64.pdf?index=trueIn 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_off0000eb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB16 5308 bytes
SHA-256: 48434d5885b39e683c496854af21f4e044c3c743fc68c5000234972e3bf5cf36
font_01_sfnt_off0000fd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD11 10680 bytes
SHA-256: c7702df3693fd5c39e3411a3dca6819dd5d9671e67258293379d39c481889207

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