Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15151ecd04fa835…

MALICIOUS

PDF

82.7 KB Created: 2020-11-13 05:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e6f32b9800763217eb3ad62ac45bf306 SHA-1: 9d1303f08b1431c6672a2e48352e725c77eeb235 SHA-256: c15151ecd04fa835d092c3ed4935214d2fb2a42831eeba0d8a022a69b5343717
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 'https://traffine.ru/aws?utm_term=berserk+opening+2016'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL indicates an attempt to lure users to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=berserk+opening+2016 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_5f9eccaa30b89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5fa5dbdbaac59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f8abc30508ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_5fa5a9e3585f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_5fa555e5bb88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_5fadb87fd9199.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/niporofez/banking_financial_terminology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880c8b6f-73d6-4b07-91fc-606fedcd3479/java_projects_with_source_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f532d1e6-616a-47d3-9e75-9db6cd971b7f/aint_no_mountain_high_mp3_download_frfee.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/20874437469.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/pejif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c441256a-3b5c-498f-b426-f8d026efe8f3/45236044374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c41be9d-1cb7-4847-8727-73c5225a308d/kisilajaluruluxavanox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD291 17340 bytes
SHA-256: 288a5978509184fcbabcfd29a51941a845aef36cb317ecf9533b6d43495c6ef9
font_01_sfnt_off000109a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A9 5336 bytes
SHA-256: 53a8abc0d1703ba97952a220e29393e3a67010c5112e4b51067b736b6ee0f237
font_02_sfnt_off00011bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF3 9996 bytes
SHA-256: 0f9d7e1a4a72efe2d90970c87564ed9151a4f385d01aa6734fd7c47fbadd2ac2

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