Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5469823b312ea48…

MALICIOUS

PDF

79.1 KB Created: 2021-02-25 18:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0e44191a2c5d3dc46592333f6428ee48 SHA-1: 436f3ef0443166712381b11c0d890c0b45c426cf SHA-256: d5469823b312ea480c6fba41474e7b67d79ec0965874373da9e48e38b382edc2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and acting as a link farm, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=how+to+read+egyptian PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476578/normal_5fdcdc1a5bd82.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/57a364581fb3967.pdfIn PDF document text
    • http://gdztut.com/galvanised_roof_sheets_box_profile7m09l.pdfIn PDF document text
    • http://rewita.fun/22741457083dow2k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403565/normal_5ffbe9de9320c.pdfIn PDF document text
    • http://winfreeiphone.xyz/sony_icd-ux533fb9dgm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380228/normal_5fe265705033e.pdfIn PDF document text
    • https://cdn.sqhk.co/derebeduno/7iaifhg/jetatufufisurebexedamiz.pdfIn PDF document text
    • https://dibigisilob.weebly.com/uploads/1/3/1/6/131607467/milimenenexobubaj.pdfIn PDF document text
    • https://zitasiga.weebly.com/uploads/1/3/6/0/136088478/golivemo_lapume_sanevujakeperu_kukifopegemumud.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/i7tntjg/jodubosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/telasebisu/newirapemenulanupes.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/tabodalulopezajafux.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/blouse_designs_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 3492 bytes
SHA-256: c3f1556e98c2024eebba209f0fca8d6fc6c42766748575f7fc06fe07fcaade61
font_01_sfnt_off0000f86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86B 5072 bytes
SHA-256: 3362eab1ee754e2e95c7f7a58a9d21bd49b3c39b0920c03d8aa7d3f5991061cb
font_02_sfnt_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 11492 bytes
SHA-256: f8aae9ed9f1345dfbb3a70a4ce5c14dcec563d7c199dcefe4026a72aa94894c5

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