Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ad6afd560f1187…

MALICIOUS

PDF

64.9 KB Created: 2020-12-17 21:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cb54d716cb5cccf856698d164476a359 SHA-1: e0a10bff3af32d0e93aa98621888e2a2c4c43a1f SHA-256: 82ad6afd560f1187ac1953e84dcb59e7a0234eb0e3603b479737da64ce0546ed
194 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 'https://traffine.ru/strik?utm_term=ak+scope+mount+rear+sight'. This URL is also flagged as a high-risk SEO redirector, commonly used for phishing lures. The ML classifier and ClamAV detection further confirm the malicious nature of the file, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=ak+scope+mount+rear+sight In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_5fb28647c08fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f9784790727e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f8ab5da1ab7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424662/normal_5fcb57b7c0310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf53bc173fb5383b991c77/1606374340656/silicone_free_foundation_stick.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc117c3a3bf4b14abaa53c7/t/5fc50d0feaf37e3b643c1c2d/1606749457212/93449138191.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a7d55bcb0228a2a2fb4a/t/5fc97014c8e99239e003703b/1607036948298/58851681167.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13274cd1e280355d63052/t/5fcb070136758319a54bba2b/1607141122042/vibumaravezikodavevipetud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf526561e25426e12f5600/1606373995260/jojiku.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/telugu_movies_website_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc366d6ab79f442f239893b/t/5fcff726547f49303fef3157/1607464742525/fifutixuvitegudumifomi.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/las_venturas_gta.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcef449d104e5f152c78ec/1606217543052/72161701779.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0df209955c744b53b696b/t/5fc4f78b3c02f22b9da87349/1606743947354/16757803996.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC170 5368 bytes
SHA-256: ddb40bd9e1bd6f51c4a3171f446ed86526e4d0d35a2af7239e9905d6a23a5e69
font_01_sfnt_off0000d38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38C 10440 bytes
SHA-256: cf5a42696159e84b9d16c22210ec5804b0ad1516930ff10726c55c5997c1ff4b

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