Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9b82cf9bed3338…

MALICIOUS

PDF

72.7 KB Created: 2020-12-14 22:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6c098f2e0525f604346e711f653f6129 SHA-1: 1a9600ff291fdb255af241713720219ac5b251f9 SHA-256: 0a9b82cf9bed3338e8edb24829af0a9bd1e5352aff6a83a41d258b8a0316cc34
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'trafficel.ru', which is likely part of a malicious campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://trafficel.ru/aws?utm_term=c+i+a+t+ka+full+form PDF link annotation
    • https://rudanivaxaf.weebly.com/uploads/1/3/4/4/134497940/1d550c29829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479942/normal_5fc38027c6b68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f8ce7be80d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_5fb38c43818f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f953341ee3ac.pdfIn PDF document text
    • https://fofaxofik.weebly.com/uploads/1/3/4/5/134521529/rumupof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366964/normal_5fcdbffc6e1a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f896f8f09a3e.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/5fbce344be7cfc36344e8aaf/t/5fbf518861e25426e12f4b4e/1606373769616/daewoo_dsl_601_service_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d446ab79f442f2293e00/t/5fc2c6f09ee0f32b87af1bbe/1606600432744/is_pellon_the_same_as_interfacing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5994a7848ba205d38a9b6/t/5fd67898d654060362cb155e/1607891099045/commercial_lease_agreement_form_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf543eeaf37e3b6492a98f/1606374463968/77203820625.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50e1111f6a41984a06ac5/t/5fd71a06154d727871049739/1607932424211/93539683066.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf9b618e72e5fdb9caef7/1606285752043/rizulufoxitagafutopugoxi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a00dd49dd124473946a2/t/5fc2edd02dd96f59184f0ea7/1606610384793/jaxokiwuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11628df132613bbbed3cd/t/5fc7b3aaa038a451bcf71933/1606923178770/non_rev_loads_app.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_off0000e139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE139 4704 bytes
SHA-256: c4fd1675b16c0d31225165f1076956c997062236c331da587b4456636da014d8
font_01_sfnt_off0000f121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF121 11064 bytes
SHA-256: 0b779a6121b34dde7ef306648ccbabf5861acae90d962641c6baf0e1ee388602

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