Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fec260eb6c50752…

MALICIOUS

PDF

74.4 KB Created: 2021-05-19 09:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b32bd5c5f4061d9d6a10b2db2e296cdd SHA-1: e8c55012ee516e6a8891c1251e53f70eda445046 SHA-256: 3fec260eb6c50752a8c14ebbbde105292b0c9961c7d085b05f3aac3ec91d2688
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are consistent with techniques used to deliver malicious content or redirect users to phishing sites.

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://gimoguvi.ru/strik?utm_term=how+to+start+a+coleman+propane+heater
    • https://cdn-cms.f-static.net/uploads/4468531/normal_604b2e1a3f7c4.pdf
    • https://static.s123-cdn-static.com/uploads/4478422/normal_5fdcfb5c9c807.pdf
    • https://cdn-cms.f-static.net/uploads/4366654/normal_605d881381abc.pdf
    • https://cdn-cms.f-static.net/uploads/4420911/normal_6066d2bb569c0.pdf
    • http://nafotasu.22web.org/advertising_campaign_planning_and_execution.pdf
    • https://cdn-cms.f-static.net/uploads/4408195/normal_603b6023a918b.pdf
    • https://cdn-cms.f-static.net/uploads/4505699/normal_6063cf429c3cf.pdf
    • https://cdn-cms.f-static.net/uploads/4374517/normal_6010914be5ce4.pdf
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fdf545d2c2fe.pdf
    • https://cdn-cms.f-static.net/uploads/4393637/normal_60494f1ce9b7d.pdf
    • https://cdn-cms.f-static.net/uploads/4444850/normal_5fd33fd56ffab.pdf
    • https://cdn-cms.f-static.net/uploads/4477615/normal_604adefb15688.pdf
    • http://natenezen.22web.org/67348328919.pdf
    • https://cdn-cms.f-static.net/uploads/4464327/normal_602801b85728d.pdf
    • https://cdn-cms.f-static.net/uploads/4480736/normal_6045eefd9056b.pdf
    • https://static.s123-cdn-static.com/uploads/4404725/normal_5fe2d2a57e900.pdf
    • https://cdn-cms.f-static.net/uploads/4445107/normal_60205cbd2ae82.pdf
    • https://cdn-cms.f-static.net/uploads/4417325/normal_60272066aac73.pdf
    • https://static.s123-cdn-static.com/uploads/4378160/normal_5fed9af3a4698.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000e284.bin
d5feb4584480b2473c095935bdbfca0f964cb3296e18fa4bb7e5c211d3ad5fa5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 5224 bytes
font_01_sfnt_off0000f428.bin
28bb65ab3553fcd8bd91624bb9895c99d888de765b0da6d86ad66fcda6266d82
pdf-font-stream PDF embedded font (sfnt) at offset 0xF428 11240 bytes