Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fd6715a8b149e3…

MALICIOUS

PDF

72.3 KB Created: 2021-02-23 12:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2bf8e7ea24a4766dacc46dcb370f6a13 SHA-1: e3de143f379f12fc743d405df8d9eec77cecf85d SHA-256: 04fd6715a8b149e314ef304e5ee3980700650df08f1eb36d2125440a12b15d3d
126 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be related to a service manual, likely a lure to encourage users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=singer+4452+service+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445103/normal_5fed1eaccbab1.pdfIn PDF document text
    • http://temppicture.xyz/linux_basics_for_hackers_downloa81sso.pdfIn PDF document text
    • http://1cats.space/manual_calefont_splendid_ionizado_7_litros5uml2.pdfIn PDF document text
    • http://goodshopsales.xyz/89278559449kus3e.pdfIn PDF document text
    • http://podcard2020.site/hosanna_marcos_barrientos_piano_chords4zaj1.pdfIn PDF document text
    • https://xolivura.weebly.com/uploads/1/3/5/9/135958321/5173840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490920/normal_5fe7032bbc33b.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/nms_frigates_guide9a8pg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408871/normal_5fe25287b185d.pdfIn PDF document text
    • http://stakingyfi.com/the_wave_painting_meaningmeh8h.pdfIn PDF document text
    • http://tophomework.space/pathophysiology_definition1u1wq.pdfIn PDF document text
    • http://sesalon.xyz/25847763145a59u3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 5624 bytes
SHA-256: d7ad1a8c00aee1eb03f1c0bd05b4de3be9d5ae767b18bcdd2b33316056f098e2
font_01_sfnt_off0000f079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 10600 bytes
SHA-256: 654cefd11c29e8e06b88e8eca91086b4729c599450e2748a3351694b57640a0f

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