Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef79c4d80c13317…

MALICIOUS

PDF

71.6 KB Created: 2020-11-13 11:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0fdd28bdc9a9cbaf61ca27b862806d8 SHA-1: 7bef44499bc34080e2ab24b56185fd0c88aa1804 SHA-256: bef79c4d80c1331717f6a1e3c452ebeb216af0f28f1441acd13b7190906ebf00
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a lure related to 'how to tie a mariners knot'. It embeds a URL pointing to 'traffking.ru', which is highly suspicious given the context and the ClamAV detection as 'Pdf.Phishing.Trojan'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffking.ru/123?utm_term=how+to+tie+a+mariners+knot
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f8b5786794e0.pdf
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5fa747fef21b1.pdf
    • https://cdn-cms.f-static.net/uploads/4474191/normal_5fa8302ff253a.pdf
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5f9d5c8b37c56.pdf
    • https://cdn-cms.f-static.net/uploads/4422137/normal_5f970a80748e1.pdf
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5faa7291c2037.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/purufiz/vemimewosikovomadapujuk.pdf
    • https://s3.amazonaws.com/jexijer/kijidufelopi.pdf
    • https://s3.amazonaws.com/bizamesuwepe/sujovobonesenubogilowofo.pdf
    • https://s3.amazonaws.com/sedimeraxufi/uniden_bcd396xt_manual.pdf
    • https://uploads.strikinglycdn.com/files/4ca007f4-fdf2-4007-8d60-fe38af421601/wowere.pdf
    • https://s3.amazonaws.com/vopadofugon/52738469336.pdf
    • https://s3.amazonaws.com/sesafefanulokam/minima_moralia_trke.pdf
    • https://s3.amazonaws.com/guwutivupudutu/top_alt_right_websites.pdf
    • https://uploads.strikinglycdn.com/files/79dcbe43-c309-4d2b-98e0-f57dcb4f9457/filowuwaxafatugawilonav.pdf
    • https://s3.amazonaws.com/xeroguru/5e_planeswalker_class.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d28c.bin
fa8dcbde196faaaba886f61e606a2e10d850f2a036c406101edba852ba6882f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD28C 4704 bytes
font_01_sfnt_off0000e26f.bin
5d9cab83622fdf6a621b8dd601f18e6dbe178cafc0ed38ec15d4e52044a686b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE26F 9748 bytes
font_02_sfnt_off00010372.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 4324 bytes