Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d71a6f549d6ba2…

MALICIOUS

PDF

89.5 KB Created: 2020-12-16 06:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: df1d99eb61de5006e0ff818f204f97b1 SHA-1: d5681258d61a50fe9522343d6bf55c8509d98b8d SHA-256: b8d71a6f549d6ba23351e1e48cd84d33a58bc3482c244108e647b817a3cdcba8
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 'traffmen.ru'. Additionally, ML classification and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of PDF redirection often involves embedded JavaScript to facilitate the malicious link, hence the inclusion of T1059.007. The primary goal appears to be directing users to potentially harmful external sites.

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://traffmen.ru/123?utm_term=corner+dining+table+set In PDF document text
    • https://pemovoxi.weebly.com/uploads/1/3/4/6/134680353/zuborawuzeroboduz.pdfIn PDF document text
    • https://zegaxazidunuxe.weebly.com/uploads/1/3/4/7/134746987/5619825.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/5189794.pdfIn PDF document text
    • https://lesavudipuvu.weebly.com/uploads/1/3/4/3/134338744/kuvup.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/1cfcaab3-b737-4592-886c-ac19cea55c67/lazilef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a921df132613bbc31d79/t/5fcd64695d2e6f3bda4fbca2/1607296106693/vugojibikiwojixuwejozi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfe2568bfc51861682467/1606221349738/voice_over_classes_los_angeles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a6c721-68ba-4192-b24c-97b5ca3f5238/parallel_and_perpendicular_lines_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb84aecb-70ab-43a8-82c8-b3963aa3cf5c/pakanojukevadebopopevo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cd50be9b69395123d147/t/5fd664a2ffab5d3c56fa93af/1607885986494/30583268770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5105c6f-255f-4606-a87f-ad0e224c6d90/loketorerolukibotonanifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111e4ccb-77ce-4d4c-a3d3-c9652a3f5169/dojurukutuxelewuv.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_off00012001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12001 5040 bytes
SHA-256: 29a707d67e5fc5cbc7c0b20d45ffa44ad5264df604d43ff974e9fc3b9935b4fe
font_01_sfnt_off00013128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13128 12132 bytes
SHA-256: 433ee27eee5dcfe379bbc7eaa908fc515bb27ffa81dd45507b8ad921ab9c544c

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