Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b8754db7b2c8d2…

MALICIOUS

PDF

71.4 KB Created: 2020-12-27 09:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: be1441889537fe81c2759d55963f9273 SHA-1: 0c7c3139bda3d2221ab19c2bef8d33cb3dc825a5 SHA-256: 08b8754db7b2c8d223ff513cb66bdedf0d712a2b7500bb848ed4ec74b5bdd874
162 Risk Score
Tags
free-cdn-ebook-manual-lure

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'. This, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The presence of a 'download button' heuristic suggests a lure to download a payload, likely initiated by the embedded link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=bubble+bobble+para+celular+android In PDF document text
    • https://static.s123-cdn-static.com/uploads/4410694/normal_5fc86f5724344.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/djbhhjc/wugumijewel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5fa98e34c4688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_5fb9d67a570bb.pdfIn PDF document text
    • https://cdn.sqhk.co/zeterabaxax/5tDgcog/makelukazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_5fd76ae80087e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_5fa104a15cc4f.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/d7gejc5/all_star_weekend_basketball_shoes.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/524088af-d5fb-4d45-9519-b74452796b42/67611399474.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/anti_smoking_campaign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570a2862-8fc1-48c4-9d3c-1e69156f9e2f/dragon_ball_episode_of_bardock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b2b9de-cab1-49c6-ad62-d2d51b6d34f1/niduromofifulodizef.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D5 5076 bytes
SHA-256: 4d9020b3eb43adffa53030e64af930b793216e75bddfe4bc3c15c2b94d8fdd3f
font_01_sfnt_off0000d71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71D 10880 bytes
SHA-256: 2d922d72b40063a5cfc09a0dca693883990821acc6517d72289655f41ebdd66b
font_02_sfnt_off0000fbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF5 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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