Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd3284d84c0ec89…

MALICIOUS

PDF

71.8 KB Created: 2021-01-19 21:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 05df192adf281e6ea21e6add06445d05 SHA-1: 73b17460fc6f2c5822b80c52e8a9b133038482f8 SHA-256: fbd3284d84c0ec892273c33aea66107e442d7f8c9650af2815c819e081772eb0
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector pointing to 'ggtraff.ru'. Another heuristic indicates a PDF link farm, suggesting an attempt to generate traffic or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=dishonored+2+black+market+key+royal+conservatory In PDF document text
    • https://wufunuxiropid.weebly.com/uploads/1/3/2/7/132712508/52eb83ed436f612.pdfIn PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/sefetikugimug.pdfIn PDF document text
    • https://virigegeke.weebly.com/uploads/1/3/2/7/132740897/1211370.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480598/normal_5fde855e66a36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5fb2c50e9e6f8.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/pizonelobozenijegegi.pdfIn PDF document text
    • https://nidatufibamukun.weebly.com/uploads/1/3/4/1/134131265/deminogaxaparo-luxaluzow-fevenod-lasixuk.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/tawovojo/powerpoint_calendar_template_2019_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/aedes_aegypti_life_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/egms_reach_imls.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/nuzowip.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/android_app_to_auto_answer_calls.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/pawufugijelonewimu.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/fusionner_2_avec_adobe_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/28423747658.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/vefufil.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/63558741790.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_off0000da63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA63 5676 bytes
SHA-256: 259b803b99552d4aeb8cbc081fc40e6c29c6a94ae5794e016d070c3bce141c97
font_01_sfnt_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 10572 bytes
SHA-256: 77f7dae3d64e316fe1776dcbab32a1071022762f93c4ccadda17afaa5b6495c0

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