Malicious PDF — malware analysis report

Static analysis result for SHA-256 b449b6af77d50c9e…

MALICIOUS

PDF

71.0 KB Created: 2020-12-02 15:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b406f522b9818716e60f09cbf92a34c1 SHA-1: 134255fd5b92f9c0abaef9956e759adf232d55a6 SHA-256: b449b6af77d50c9ea15b4c223cc0762826615bff73670cfb492a7cd6d12e14e8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The PDF contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs indicate an attempt to redirect users to potentially malicious or deceptive websites.

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://traffine.ru/aws?utm_term=agathis+dammara+pdf
    • https://kavanezeso.weebly.com/uploads/1/3/4/4/134477356/falusidonebuwon_kogonutogogina.pdf
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/makidov.pdf
    • https://vodoxuzet.weebly.com/uploads/1/3/2/6/132681632/bagotigazigate-jijil-lodapugo.pdf
    • https://bulububurelet.weebly.com/uploads/1/3/4/7/134742815/2818769.pdf
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/jozetajugivu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1daab00e-c4a3-407b-b143-51287638bea7/53590669587.pdf
    • https://static1.squarespace.com/static/5fc654295687f52b6ba616b7/t/5fc6e960c953717e09c9ce48/1606871393046/83069580810.pdf
    • https://s3.amazonaws.com/selivuvumepaveb/obstructing_a_police_officer_sentencing_guidelines_georgia.pdf
    • https://s3.amazonaws.com/pukiza/icao_annex_10_volume_5.pdf
    • https://static1.squarespace.com/static/5fc5b99cc14dfd36fe1285aa/t/5fc70b427995075abdda8b8f/1606880067670/tap_tap_dash_kostenlos_online_spielen.pdf
    • https://uploads.strikinglycdn.com/files/28c3eca5-7ce2-46f6-8529-e2634891771f/hunger_games_catching_fire_watch_online_free_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/f65189ec-aa0d-47dd-9aa0-a41ffd26cefc/49262108336.pdf
    • https://s3.amazonaws.com/gupuso/behind_the_green_mask_un_agenda_21_download.pdf
    • https://s3.amazonaws.com/gezetega/lobafewurabadizapivubere.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_off0000cde4.bin
31c1d6c6d6c0d66534b7fefc6e5e6c18d478c325388e1fdce19b495758f38f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE4 5412 bytes
font_01_sfnt_off0000e024.bin
09ff9cda26a5f6f0b60994fe82ca43b78d91af643d8ec8f7894df4157245a629		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 14840 bytes

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