Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e645dbf74dea30…

MALICIOUS

PDF

76.3 KB Created: 2020-12-17 00:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 70eaf41a813267eb61ce382c06e7dd92 SHA-1: 169b262165c4a11ef0c62dcc7020942f7d4ad9bd SHA-256: a3e645dbf74dea30ba96a7a32eb5e85f456b22091ccb0d6550005a5b54126679
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=profit+a+prendre+vs+license In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8acefc9653d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5fda837b66ddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8ad66bd751d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_5fa339fe1d2b7.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/5fbe0486173fb5383b68b35c/1606288522626/midlothian_middle_school_mascot.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/lidl_galati_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/guide_du_demandeur_d_asile_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/vojodizen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c204c30a162e0c5e803a/t/5fceecc8798354522d02ca36/1607396556886/mefanoliladi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58376e2fce462bcab2a8b/t/5fcb191f66ddd570b0efb5c2/1607145769227/57399455585.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e08512facd59ceacd9cd/t/5fc181c9f8cdb769c61c8c50/1606517193657/knicker_knob_stable.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/93567132430.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1129368612547ed5f20ea/t/5fc3527c3c6ccf69f3c8c32f/1606636156817/seneca_ridge_middle_school_bell_schedule.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e44e92c50b1a1e7784dc/t/5fcd7b2574a40730fbaf0b7d/1607301926057/jasatobes.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/nudawolixofilorumalop.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_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 5208 bytes
SHA-256: 629476999881d158e866fe5b83f3b4fbed0a015b3e7e786f42616e790758e776
font_01_sfnt_off0000ff0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0A 11132 bytes
SHA-256: 18084965deabb146486fea046402960887c64fc704580bfd55b9d292db325c30

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