Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2df69553dd309d8…

MALICIOUS

PDF

63.5 KB Created: 2021-01-25 10:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0eb75e8c8654abfd26ccd6cc82dc0680 SHA-1: c4262164462b7752d85d822fbac37280321d3696 SHA-256: b2df69553dd309d8989032143d8ffd226a69b35bc3b1457df8188e7dbd87f629
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with one prominent malicious URL being https://traffking.ru/123. The ClamAV detection and ML classifier also indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to potentially malicious sites, aligning with phishing or content-driven malware delivery tactics.

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 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://traffking.ru/123?utm_term=powder+by+the+pound+phone+number PDF link annotation
    • http://mananeje.66ghz.com/wapesukonebumadom.pdfIn PDF document text
    • http://antileqphh.site/react_drag_and_drop_grid_examplecuoe9.pdfIn PDF document text
    • http://gazzsheff.xyz/minecraft_survival_island_game_online_freei5uql.pdfIn PDF document text
    • https://rugajasaxi.weebly.com/uploads/1/3/4/0/134096424/5610946.pdfIn PDF document text
    • http://nnorm-id.com/75807836915kzfvw.pdfIn PDF document text
    • http://creamwalls.space/tovuxazefalaruxiwodetmnquf.pdfIn PDF document text
    • http://ontrade.top/sloth_goonies_actorrlro6.pdfIn PDF document text
    • https://gizunujidibe.weebly.com/uploads/1/3/0/8/130814387/8507779.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/lakujusitejojet/amber_estate_design_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/sql_server_management_studio_2016_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/51146991864.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/xijoxuwokudefofiposeriva.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/fuvufifinudotuvewav.pdfIn PDF document text
    • http://kujujigufa.epizy.com/11275543467.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/thrombosed_hemorrhoid_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/65257888610.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/bootable_iso_image_creator.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_off0000bdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD3 5116 bytes
SHA-256: 1a23612833abb23e4b545b0af1ff612ac769b5d5375a06ecf38d666176db2fc8
font_01_sfnt_off0000cf22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF22 9940 bytes
SHA-256: add949c839282d0402b43d8116a3e0bfd9ab96487474cc3dcb3c213a9250d93f

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