Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eaae066ffaf5c2…

MALICIOUS

PDF

65.8 KB Created: 2020-11-13 16:47:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 647c74c2cec2959e47d3ffdad280bf84 SHA-1: bb6e7e8ee2e3b0755968c875f3cf95bfc249da9f SHA-256: 34eaae066ffaf5c2048c7bb231158034f795f350899eb79d7b331ffc987e92c9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to 'traffset.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are likely intended to manipulate search engine results or direct users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=geometry+unit+8+study+guide+answers
    • https://fojigexo.weebly.com/uploads/1/3/4/2/134235048/jaxinemuvawivarabiza.pdf
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/vesefotim_toxopadolifipu.pdf
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5fae1c79e63fc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/degerutisig/dagobigeka.pdf
    • https://s3.amazonaws.com/pusumowi/xutapaluduluvuraguvevok.pdf
    • https://s3.amazonaws.com/lorifawuvawot/c_must_declare_the_scalar_variable_sql_error.pdf
    • https://s3.amazonaws.com/wokesabisevo/garmin_gps_user_guide.pdf
    • https://s3.amazonaws.com/gulapore/2735503324.pdf
    • https://s3.amazonaws.com/sefepugolupalax/darksiders_3_trainer_free.pdf
    • https://uploads.strikinglycdn.com/files/8f273e6a-24fe-45ff-ad31-958d0812c061/sbp_tv_download.pdf
    • https://s3.amazonaws.com/lososimap/mopukojigatit.pdf
    • https://uploads.strikinglycdn.com/files/9f1f4362-63d9-4bae-a4aa-37b88b5cb010/zuxexosulefujoke.pdf
    • https://s3.amazonaws.com/liwafo/the_hunger_games_book_chapter_13_summary.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c610.bin
5eab27d204af26c9e204b7b6e11423766cf67f6ab3bc5c2bfadc59f46894ba99
pdf-font-stream PDF embedded font (sfnt) at offset 0xC610 5532 bytes
font_01_sfnt_off0000d8e4.bin
ac0a9d4a4cd027d76aedc574fb4eb06dba03b98b45bd73659f452fbd0bc113b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 9852 bytes