Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06b10423093649b…

MALICIOUS

PDF

71.2 KB Created: 2021-06-08 22:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67c79d3265ce5ec128e6fd0d46364090 SHA-1: 7d79c32812a12f6e340da3e92e5c00ee89b45652 SHA-256: f06b10423093649b37e088c671eb34fe341305d6437a3d2725d7b52344791ce8
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to 'coretry.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Vray material library free download', which is likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://coretry.ru/pbw?utm_term=vray+material+library+free+download
    • https://cdn-cms.f-static.net/uploads/4390638/normal_602f63f8511c1.pdf
    • https://kivenawuvu.weebly.com/uploads/1/3/1/1/131163776/tepejofeliguzuv-zaxerugifaxid-ziwedefujeni-nojifusefir.pdf
    • https://dulawatekonirul.weebly.com/uploads/1/3/4/5/134589918/1031a.pdf
    • https://static.s123-cdn-static.com/uploads/4392441/normal_5fcf69e34b575.pdf
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/67cea9282a40.pdf
    • https://volikupiwete.weebly.com/uploads/1/3/4/6/134676366/04138e71603f.pdf
    • https://static.s123-cdn-static.com/uploads/4390051/normal_5ffe57537f66f.pdf
    • https://static.s123-cdn-static.com/uploads/4477637/normal_5fcb4bb04ed77.pdf
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/dogarobafeda_datirodiwijovi_kemikemetiza_burofudokizume.pdf
    • https://static.s123-cdn-static.com/uploads/4469631/normal_5fe2aa4e2d2c0.pdf
    • https://static.s123-cdn-static-d.com/uploads/4381737/normal_60b2526621347.pdf
    • https://static.s123-cdn-static.com/uploads/4473971/normal_5fcfb2ff2c430.pdf
    • https://javevopikaze.weebly.com/uploads/1/3/4/4/134489205/5654758ee101.pdf
    • https://cdn-cms.f-static.net/uploads/4477910/normal_606ea24221268.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kufogokoges.pbworks.com/w/file/fetch/144462153/blockman_go_cheat_mod_apk.pdf
    • http://lebunurivugu.pbworks.com/f/44368910684.pdf
    • http://sewafebi.pbworks.com/f/whatever_a_man_thinketh_so_is_he_niv.pdf
    • http://natetusiwuwo.pbworks.com/f/complete_and_incomplete_sentences_worksheet_with_answers.pdf
    • http://poxanoralanu.pbworks.com/w/file/fetch/144425898/4_qul_sharif_in_hindi.pdf
    • http://wepadigisita.pbworks.com/w/file/fetch/144629649/jezifeganogujekulinujow.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_off0000db08.bin
e67f1a718f29918254765c83264b07eaaeab2597c71f25600ec78b34ebda46a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB08 5172 bytes
font_01_sfnt_off0000eca3.bin
670deeba7d9801858d85c7cdeafd8efc2379359677436289c7e1922e5e42d0c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 10252 bytes

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