Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3384b3a0a8f3bcf…

MALICIOUS

PDF

70.1 KB Created: 2021-02-21 13:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 609607ab2fd97e03e5b74a29cd54ea83 SHA-1: 2b9e3c6fb16866ca7a0dd2c9b25737fe936733ce SHA-256: a3384b3a0a8f3bcf9be285915700820a2f1b781025de7d1784000fcafba6e84c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious domain ('jacksth.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to manipulate search results or distribute malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=quotes+about+lsu+tiger+stadium PDF link annotation
    • https://cdn.sqhk.co/xubupigegi/3Iic4hd/nba_2k20_myteam_gameplay_tips.pdfIn PDF document text
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/2371448.pdfIn PDF document text
    • http://nubolats.xyz/728690692ejyjk.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/jMlMieY/ronenubonerowufuwulebigex.pdfIn PDF document text
    • https://sekowuwumobof.weebly.com/uploads/1/3/5/3/135394032/f12dba.pdfIn PDF document text
    • http://visionnew.xyz/906984395450ueqz.pdfIn PDF document text
    • https://wikiredapitij.weebly.com/uploads/1/3/2/7/132712416/7996f.pdfIn PDF document text
    • http://dronextactical.xyz/what_is_the_age_of_reason_in_the_biblel3g05.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/wizidimawag/phet_gravity_force_lab_worksheet_answers.pdfIn PDF document text
    • http://waxivetik.epizy.com/casu_marzu_formaggio_marcio.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/transformateur_bobine_point_neutre.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/dietary_supplement_labeling_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/anime_war_episode_12.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_off0000d5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C9 5348 bytes
SHA-256: b685d75fa1c1d8229ab2746572d85acb845948446115929c8d8d3b2a278723c6
font_01_sfnt_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 10700 bytes
SHA-256: 614cfe271bc06907ae763cae6427aaaac539e864bc84a51a82dfbbfdd27ed55d

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