Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca887b3f74721a2…

MALICIOUS

PDF

93.9 KB Created: 2020-11-24 21:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 500bc4fe8b085a7f514aec17feec318e SHA-1: 00134485d6203c3b0c29950d713290702af680d5 SHA-256: 6ca887b3f74721a29192cdcdb63c72b55ad3b7e006614246855645d9db056696
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure, specifically 'https://traffking.ru/wb?keyword=backend%20template%20php'. This, combined with a high ML classifier score and ClamAV detection, strongly suggests a malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=backend%20template%20php In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5fb61c9f16936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8e798c0732e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_5f9356f6a870a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_5f9ffdf7c2a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5f9637893f1f6.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/gateme/5017131887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cf6c48-9784-4077-b902-0926d46f48b4/philippines_ethnic_groups_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e2d135-9d37-41b1-88e7-69dfea90b358/15874652681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb28f9b9-d4e2-4cb5-ae26-ffba7a19e4b7/percent_error_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f5bf5d-9be5-458b-975c-61e4b21d8efb/dorivezonofazosumalu.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/vatipaxeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b39933-f8bb-48cc-bdce-b2fde4463ba7/33955671512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d695b8-2b48-448e-b9c6-0fec8e1dbc56/kitanabujisikuvuf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9B 5152 bytes
SHA-256: 26d883f6bc8a327c089f88708c5cdd136e4696e0f931ae855fb2d458dfdb58e4
font_01_sfnt_off00011ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF4 4272 bytes
SHA-256: 3e9f68bb583a408ee974e4ced8b68c2d71a653c3cf6c26f61687d32c3df57e86
font_02_sfnt_off00012fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD2 10776 bytes
SHA-256: 41d53713520ccbdfb47051a9f2300491b7928fa586b5c366b8584a662bc518f4
font_03_sfnt_off00015478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15478 16652 bytes
SHA-256: 9b760ef5892fa3c97061b5095b21321328ebfc20db1468483bae90968f3c9d0e

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