Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8f9be3443de130…

MALICIOUS

PDF

70.4 KB Created: 2020-11-24 03:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 706a136c6d7d668aed114eb1865ffb67 SHA-1: df53a0fe65ea690aac996329a9905adfc6f4321e SHA-256: 6f8f9be3443de1301004f6d4cfa67c36071f75e651a8a7f33f136a7e66a723f5
214 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were extracted, the presence of numerous external links and the ClamAV detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://traffine.ru/strik?utm_term=elma+xenoblade+chronicles+2 In PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/2287031.pdfIn PDF document text
    • https://kafuribawixunav.weebly.com/uploads/1/3/4/8/134897544/07a3669.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/jugokukujun.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/b26cccaa-6390-4e24-8a40-d84814053f0a/96502809449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa92a70-6d97-4290-8946-de5c6b0daf83/22417869688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f6d594-29c8-4e01-b4b4-6ac042193060/3845481171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef03cecc-9a74-4427-8fa0-cfb133c86e93/43733790905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d837d310-7cf6-41f7-bc23-5828e210290e/dudepofekalike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b7b289-77b8-4d32-b5c4-38b85e4d5984/disney_infinity_3.0_feats_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1c2569-9bbe-4494-9d1c-86108ed262a5/mikevirog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ece634-5780-45cf-a04d-1dc57ce7f987/kagubugepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8bbc714-e9d6-485b-a927-9e0a5032292e/wuvigigufibutaluzilewema.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_off0000d478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD478 5476 bytes
SHA-256: cd48b0e2c6c38c72c1f1d8a34d4a66b1c760355fcceab3ddac697d227e3bdda6
font_01_sfnt_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 11200 bytes
SHA-256: 54b02f530fe01e1318126914e5ce576f626221538ea8163b19895ae8887e2fc0

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