Malicious PDF — malware analysis report

Static analysis result for SHA-256 d193b05953ae91f0…

MALICIOUS

PDF

87.9 KB Created: 2021-02-14 03:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0bba7a5f727a54dafadb1eda65221f3f SHA-1: 627b5a77f20af1b207d56b3ed010ad40a7c772ca SHA-256: d193b05953ae91f028a4da079764fcc22c537997385beff09effd0822ea96599
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wix?keyword=astral+sorcery+perk+guide PDF link annotation
    • http://afracheat7.xyz/eine_kleine_nachtmusik_viola_sheet_musicqejqj.pdfIn PDF document text
    • http://comforfemj.fun/69291351806autsn.pdfIn PDF document text
    • http://dlkmvkoenv.info/rurujojenesukifevijogugiow89z.pdfIn PDF document text
    • http://zipogagu.iblogger.org/bivipavezukoxofere.pdfIn PDF document text
    • http://2022god.com/space_shooter_games_pcntf9l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_60286fa450732.pdfIn PDF document text
    • https://cdn.sqhk.co/fasaparoba/djdxGmW/fapelagidabemidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5fe8543d3f7cc.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/fkhjif5/35867416022.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369640/normal_5febd84216bab.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/fawekaxojakobomon8mgb4.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/hdkjguB/basketball_games_miniclip_unblocked.pdfIn PDF document text
    • http://megatorg.ru/tuzewu81dze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fegarezitima.rf.gd/conversion_of_cartesian_to_cylindrical_coordinates.pdfIn 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_off00011acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACB 5396 bytes
SHA-256: b7707c61bdbebea0dfa3b0a8efa2351a978f37c4707e831645d9bae27a767729
font_01_sfnt_off00012d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3E 11040 bytes
SHA-256: 51ea1e64ca44b4c43430db5ff2dec4c5524ebe6070ddf12489eda79a0874ebf4

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