Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2cc106871f291c…

MALICIOUS

PDF

61.2 KB Created: 2020-12-22 09:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e3793262cd8530ec9b39128ce664065 SHA-1: 7368cf5c3c6e7955b0c582528790dbbe765b3fdc SHA-256: 8d2cc106871f291c9c3ae5c37c8711e713ee9fbe0fd26ecbcfe938923a594a12
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link and another for a PDF link farm. The ML classifier also flagged the document with high confidence. While no scripts were explicitly extracted, the nature of the heuristics suggests the document is designed to redirect users to malicious or SEO-manipulated content, likely as part of a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=dave+franco+cuenta+de+instagram
    • https://sumigixutaruxaj.weebly.com/uploads/1/3/4/7/134748626/namesulevidu.pdf
    • https://static.s123-cdn-static.com/uploads/4476567/normal_5fdec745c78bc.pdf
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5fa0780c9a06d.pdf
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f88a938cd469.pdf
    • https://cdn-cms.f-static.net/uploads/4412780/normal_5fb5163cccf9a.pdf
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5f9698036a0a7.pdf
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fa5b17eec730.pdf
    • https://xilamebi.weebly.com/uploads/1/3/4/5/134598653/lomiranajonapegewude.pdf
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f9eacb27ad03.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dojivewobasuval/migetuledizu.pdf
    • https://s3.amazonaws.com/jebupofedijakuk/25995736119.pdf
    • https://uploads.strikinglycdn.com/files/84896e38-52b8-4eee-b217-acf282d667c7/finite_and_infinite_games.pdf
    • https://s3.amazonaws.com/kijelopazekune/nevovuzirulizetabagupa.pdf
    • https://s3.amazonaws.com/janodojivi/baxter_institute_international_application_form.pdf
    • https://uploads.strikinglycdn.com/files/26c1c485-2d89-4994-a891-ac2a4b9c1490/vagusizalojul.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5c7.bin
323fbcc6326de08ba9124cfc5eed730201372d4fdf493fae76d3145630343984		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C7 5368 bytes
font_01_sfnt_off0000c807.bin
6b3d8431e03472bbc0bafea927a065e766668e94384b25756eb52b1844a67756		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC807 9380 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.