Malicious PDF — malware analysis report

Static analysis result for SHA-256 3610e733a2d16c65…

MALICIOUS

PDF

102.5 KB Created: 2020-11-25 21:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a4877ef8e6017fcfd913955ef250a66 SHA-1: d3436ab5d8ecf6089d88892c16c69db66cf6c915 SHA-256: 3610e733a2d16c657c667389a9f95412bf49018485a8364f6cea66b22c043f53
204 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious URL ('traffset.ru') that is likely part of a phishing or malware distribution scheme. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' suggests a deceptive lure, and the ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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
  • 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://traffset.ru/strik?utm_term=advanced+funk+studies+de+rick+latham+pdf
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/zirilapalir-bisojexowesomes.pdf
    • https://cdn-cms.f-static.net/uploads/4374540/normal_5f891ed8993c8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kudefem/sefujogupixaneketules.pdf
    • https://s3.amazonaws.com/kevava/akbar_birbal_stories_in_english_download.pdf
    • https://s3.amazonaws.com/vobuturinivi/mimamixabunovoxozulal.pdf
    • https://s3.amazonaws.com/xubifupi/is_christianity_a_religion.pdf
    • https://s3.amazonaws.com/bupaxomu/ashrae_90._1_2016.pdf
    • https://s3.amazonaws.com/wozowuledij/95464381824.pdf
    • https://s3.amazonaws.com/kezemiradigu/saxiliwijamofufulajor.pdf
    • https://s3.amazonaws.com/lezerawe/jilofawojuperunaput.pdf
    • https://s3.amazonaws.com/jezekemunidup/zuwiwekogabemazakupi.pdf
    • https://s3.amazonaws.com/bededuxotulapil/rilupodosozumegoluwim.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/dibefugolofemerumolus.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d27.bin
cac72ad4ab782f22f05f959a575324471a6bac176c98112cde3214f41ffe084b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D27 5508 bytes
font_01_sfnt_off00014fc6.bin
e9bef3bf7b1426a8e45f5d0e40e8cf6f51c2de952c542aa39a3e4213647acb57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC6 11632 bytes
font_02_sfnt_off00017775.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17775 16204 bytes

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