Malicious PDF — malware analysis report

Static analysis result for SHA-256 944d4ae1a2c019c8…

MALICIOUS

PDF

69.0 KB Created: 2020-12-14 09:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5e8dc080a5e0b262a01df495003344a5 SHA-1: 90a965d87fba9cbc6ea07ce7053348cfded2de82 SHA-256: 944d4ae1a2c019c8ddc21eda7f783416f825d127d22f7f7025134ee25c0271e3
156 Risk Score

Malware Insights

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

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=summit+county+ohio+gis+parcel+viewer PDF link annotation
    • https://tonulolini.weebly.com/uploads/1/3/4/3/134341491/1524258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc79f8081da8a590db1a476/t/5fd18ca5880fa23343cd58ea/1607568556372/24990739906.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf67013570fb44d1faded6/1606379266500/60561184410.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc137400b6b03258f37a4df/t/5fc670414e98326c02ef5deb/1606840386293/fire_hydrant_water_fountain_diy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2830cc30a162e0c5caa26/t/5fc903336cc5762da7ad1d74/1607009078518/clicker_heroes_ruby_hack_code.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bdc717e7202640e9644a/t/5fc0daa6e6d49a06bbb20022/1606474406944/tomarivavabufam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf6052c6de34c7a38362c/1606219277891/vizuwujavanoku.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/frontier_fios_tv_guide_texas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf6b173299f0c54395cf2/1606219443683/taco_bell_job_description_for_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/pagurovirenawakuri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc779c3aa0dc1643a319e47/t/5fcc80a5c836a917f9062de1/1607237798007/strike_force_kitty_league_crazy_games.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBF 5704 bytes
SHA-256: 894fe27c80afd4173d14fb8840822cf7270ac5679d694c4eb6d3ebb10cc183c7
font_01_sfnt_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 10816 bytes
SHA-256: 2ac99c83f5e195a72ef684e8b72f533c44c4e5c02f5a3cc82a19ac701e213567

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