Malicious PDF — malware analysis report

Static analysis result for SHA-256 35673548e69f3eb0…

MALICIOUS

PDF

77.9 KB Created: 2021-06-04 12:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b73fe66e2a2b854eadcdb515a20f299a SHA-1: 2e4207137808538a4461b525df68484c11bda59e SHA-256: 35673548e69f3eb02721760944bcecdbd2d1bafd5f7676aad67051f99115972b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to appliance troubleshooting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/pbw?utm_term=how+to+put+ge+washer+in+test+mode
    • https://static.s123-cdn-static.com/uploads/4476416/normal_5ff3c9ee23d6d.pdf
    • https://static.s123-cdn-static.com/uploads/4374188/normal_5feb22705b512.pdf
    • https://static.s123-cdn-static.com/uploads/4409606/normal_5fcc2eb484880.pdf
    • https://cdn-cms.f-static.net/uploads/4476273/normal_601ad557a6fe7.pdf
    • https://lamivorimu.weebly.com/uploads/1/3/5/3/135330715/xaginuvufowufux-zekuv-sezel-rekeban.pdf
    • https://cdn-cms.f-static.net/uploads/4451563/normal_604e181715aec.pdf
    • https://vedaputenada.weebly.com/uploads/1/3/5/3/135318287/buburuf.pdf
    • https://cdn-cms.f-static.net/uploads/4386597/normal_6013e1a1f30b1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vadobadud.pbworks.com/w/file/fetch/144600699/18628799502.pdf
    • http://nefusim.pbworks.com/f/jealous_guy_piano_sheet_music.pdf
    • http://wimarolos.pbworks.com/w/file/fetch/144509121/sopodezelasusafikobufoje.pdf
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144600033/53676784017.pdf
    • http://rupebaxo.pbworks.com/w/file/fetch/144599409/29526980726.pdf
    • http://jopamedet.pbworks.com/f/20141194298.pdf
    • http://jobojifitin.pbworks.com/w/file/fetch/144454692/chemical_equilibrium_le_chateliers_principle_worksheet_answers.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_off0000ec6a.bin
0fbc454d13dec26265650288687cb2aa7f31bd6ee448d8f3d85f612ff31ffd92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6A 5392 bytes
font_01_sfnt_off0000fea7.bin
46bfaa10df5d66ea9ee541d696bf70a75999ab611350c9182f3d13abcf05ec82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 13144 bytes

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