Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e17f9bdb2b1490…

MALICIOUS

PDF

71.3 KB Created: 2020-12-18 07:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a18b6c58f739881117952852462876d6 SHA-1: 1c437de4f84e5508517f4b557906cabe5dd3e3fe SHA-256: 14e17f9bdb2b149025c84c2db7013036548683f89d71496003b09474b25a7a91
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a large number of external links, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs indicate an attempt to direct users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=introduction+to+control+systems+engineering+pdf
    • https://cdn-cms.f-static.net/uploads/4500425/normal_5fb8549615008.pdf
    • https://cdn-cms.f-static.net/uploads/4485014/normal_5faac7257ff52.pdf
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f8ecc63293c4.pdf
    • https://tazifidaron.weebly.com/uploads/1/3/4/9/134901468/8503944.pdf
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/8100678.pdf
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5fa5920b444c3.pdf
    • https://durezeneb.weebly.com/uploads/1/3/4/2/134235042/edd61.pdf
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/2535278f220e.pdf
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/ludalovinopemur-geruxe-texagoxakugudoz-vefiwexuwak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc2a825a13a450babff6b59/t/5fc4b7169b1ed0353871f64f/1606727447810/cursive_writing_capital_g.pdf
    • https://static1.squarespace.com/static/5fc38024e2fce462bc9c67ee/t/5fcb50fa9cf56e0e8b0fa652/1607160065131/nursery_rhymes_video_songs_free_download_in_tamil.pdf
    • https://s3.amazonaws.com/jovekus/kototozof.pdf
    • https://static1.squarespace.com/static/5fc0f6e9ea4a794d56455deb/t/5fc8c6d7b0f45b2a3d2db23e/1606993624106/hotword_changer_for_assistant_apkpure.pdf
    • https://static1.squarespace.com/static/5fc50bbc92c50b1a1e921daa/t/5fd1d34aae71ea6dd32067f3/1607586640461/41495550472.pdf
    • https://s3.amazonaws.com/nalifij/39096534563.pdf
    • https://static1.squarespace.com/static/5fc65c5017e72026400f3eab/t/5fc9ec341a258d244fe1e28f/1607068726697/broken_bones_games_online.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_off0000dc2e.bin
b6f5bcd39710b11541c9be3c99d5b6749c619e3c91d86f01f6c869d34b4a8d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 5304 bytes
font_01_sfnt_off0000ee2d.bin
1a7c1ae19f80a17bad2ee4964c6ce9b4b9b509ba0f2f13cacccebbb3b7cd664d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 9936 bytes

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