Malicious PDF — malware analysis report

Static analysis result for SHA-256 65061ced10bd630a…

MALICIOUS

PDF

81.2 KB Created: 2021-04-01 21:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 367aeb11cfd971b19487aaf6f2f79ada SHA-1: d420b03cc6b5e8f6129a598fcfcfeb76d85e8ab8 SHA-256: 65061ced10bd630afcf68ebd8eaf09ca1749de1562e6ae90bca493e5869f0926
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one specifically using a 'utm_term' parameter suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of multiple external URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document is designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=lego+ideas+book+pdf
    • http://ketousa.site/490526617452ndub.pdf
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/3a75f.pdf
    • https://cdn-cms.f-static.net/uploads/4489412/normal_605dbb6d7e4ca.pdf
    • https://static.s123-cdn-static.com/uploads/4499999/normal_5fe2b8fea6976.pdf
    • http://naturebiolog.space/17594880829ql037.pdf
    • http://kelnoteres.xyz/57530589635n2e2p.pdf
    • https://sewogasi.weebly.com/uploads/1/3/1/1/131163712/salufexogonaja.pdf
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5fdc341d72b2c.pdf
    • http://zuvixomajav.22web.org/42005211315.pdf
    • https://cdn-cms.f-static.net/uploads/4401515/normal_605012b1392d6.pdf
    • https://static.s123-cdn-static.com/uploads/4478387/normal_5fed22df7fc86.pdf
    • http://milesnires.xyz/symbol_ls4278_programming_barcodesbzveq.pdf
    • https://doxizuzipoleri.weebly.com/uploads/1/3/5/3/135323895/muwibar_vugexubatavaju_rajomoko_banusoguri.pdf
    • https://cdn-cms.f-static.net/uploads/4500199/normal_602d6b0de44ca.pdf
    • http://sodazetibup.iblogger.org/xileraredexafofuxo.pdf
    • https://static.s123-cdn-static.com/uploads/4496204/normal_5fc80b80b9aa7.pdf
    • http://zuzotew.22web.org/ageusia_definicion.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jamuluvuvava/vugogozana.pdf
    • https://s3.amazonaws.com/dumupa/95908595601.pdf
    • http://vevubajiziju.epizy.com/guzasibunobuv.pdf
    • http://mutoris.rf.gd/polarization_by_refraction.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cc.bin
3bfb310d79d8339741684f8d80683fc485e91fe4dc1abee88ead41467177f3cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 4828 bytes
font_01_sfnt_off00010245.bin
cddafe746262abd723910ea2881a0e78f9424cb0ec69e1f1b76afdccbd1dd362		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10245 10924 bytes
font_02_sfnt_off000127ba.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127BA 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.