Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eeddd0b9978fe7f…

MALICIOUS

PDF

97.4 KB Created: 2021-03-26 09:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4f80debb4b37c816f9ba247998ae694 SHA-1: e8b9d4a152dca2b341cedbbbf18126906d691d60 SHA-256: 3eeddd0b9978fe7ff3ace8bf34a23f6d4789dcfdc30e8ac29ccd4048e8d3c155
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or content stuffing operation. The primary URL, 'https://seumenha.ru/award?keyword=anatomia+del+nervio+facial+pdf', indicates a lure to a website disguised as a search result. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest malicious intent, likely for phishing or redirecting to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/award?keyword=anatomia+del+nervio+facial+pdf
    • https://cdn-cms.f-static.net/uploads/4464877/normal_6043346b14b1e.pdf
    • https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/3676072.pdf
    • https://cdn-cms.f-static.net/uploads/4393890/normal_6023047c26803.pdf
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5fcd0bff2115c.pdf
    • https://mejatuwunuzawe.weebly.com/uploads/1/3/0/7/130775850/mekagir.pdf
    • http://lotukaguw.sportsontheweb.net/pepusalabekonofapuned.pdf
    • https://jenejipita.weebly.com/uploads/1/3/4/4/134473981/d38ca5ef5af54f.pdf
    • https://lokevevivepino.weebly.com/uploads/1/3/4/1/134131736/mugazubi-lirukajuwo.pdf
    • https://kamejufozafa.weebly.com/uploads/1/3/4/8/134891268/kozopozitizitas_zupefewipevo_butow_zisapeto.pdf
    • https://jaxanotev.weebly.com/uploads/1/3/1/1/131164383/0a1df075ac5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://damowepoko.myartsonline.com/dikowi.pdf
    • http://dukiduzafenej.epizy.com/football_manager_2018_steam.pdf
    • http://vinegufoxa.rf.gd/injection_blow_moulding_machine.pdf
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_d1267c0a99ef463baabebbe90c44eded.pdf?index=true
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_a25124e15f9d4e9c8e31a3ae51abd209.pdf?index=true
    • http://zejatasiko.epizy.com/xejuneva.pdf
    • http://gobozukelawi.epizy.com/aao_raja_song_hd.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127f4.bin
9d51bf13c11f258c9b9acc342db9f1df323a2c852cc198080b789f4ccc21e5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127F4 5172 bytes
font_01_sfnt_off00013981.bin
2e9fae0541d4d6502aad284370bed784c75019cf1d3835ea86779ee192b79665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13981 12236 bytes
font_02_sfnt_off00016191.bin
0acc8059f877166bce1c4fff4fef292b11108634e7dda3af2d35dbe7c14c54ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16191 16164 bytes

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