Malicious PDF — malware analysis report

Static analysis result for SHA-256 a868cd44c1702bf6…

MALICIOUS

PDF

69.2 KB Created: 2020-11-17 18:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 88a2608b51187aa9bf42afd13c741dde SHA-1: 1bfef86e43ec5a9ab64ec1ad426ef3efe801a9b1 SHA-256: a868cd44c1702bf65665af393bae540d654442b96cb0bcd4d40a46e4c3f23c33
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'. This URL is also listed as an embedded URL within the document. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of phishing or malware delivery. No scripts were extracted, but the presence of a malicious link is sufficient to infer an attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/123?utm_term=bureau+of+conveyances+of+the+state+of+hawaii In PDF document text
    • https://garigokowexe.weebly.com/uploads/1/3/4/4/134440629/vuxim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_5f96584a9918d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_5f91fec3b7b4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5f932997cc497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_5fae927f8edea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f9b92cb4cee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5fb3778e8f6b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e182d34f-8236-4a04-a260-c7fb9fda3708/gejarizinawak.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/88445553029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dbcab10-7347-46d5-a20e-0579e0964471/segidobenimulanibowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43aac4f9-72a9-44c1-825b-2d63ce8d0bf4/17141845879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3002b560-3bf4-4333-8d3b-248bc6b18d20/95777283894.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/60c_fulton_road.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_off0000d02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02C 5240 bytes
SHA-256: ec68861e5b10bb0d1732f7c4913c4b3cd461860395d82411485df645f48c6bd4
font_01_sfnt_off0000e21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 11104 bytes
SHA-256: 0d1ea50169e1a854f89d9113b2ab6887363a1ca211e36ae957d70e4d7c89280a

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