Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cecb8ceeafb4d4…

MALICIOUS

PDF

68.9 KB Created: 2020-12-21 06:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36c9093df0ca375c8c96fa2329f8a543 SHA-1: 9941f093ee108ad646a0600edf0ba5d9c6765c56 SHA-256: b1cecb8ceeafb4d41c3abc99e86bee6a896a9cef483822e779a3ea3b65a59115
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of an external URI and the overall detection suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=mexico+national+football+team+name
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5fae79663c3b3.pdf
    • https://cdn-cms.f-static.net/uploads/4459318/normal_5fb298d32e61c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sixolose/newigaxevapati.pdf
    • https://uploads.strikinglycdn.com/files/1ddedc01-8076-4cf1-9450-7ef26fd61151/heathcliff_and_catherine_quotes.pdf
    • https://uploads.strikinglycdn.com/files/5c36a8bf-14c0-48f0-b7a6-ac9ba4afe7a8/multiplying_binomials_worksheet_foil.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf580008845d092481882b/1606375426519/apkpure_appvn_ios.pdf
    • https://s3.amazonaws.com/juzowilipi/dugusa.pdf
    • https://static1.squarespace.com/static/5fdd539cc66bff209e8009b6/t/5fdde2045809ae3434edd65a/1608376837632/4848076393.pdf
    • https://s3.amazonaws.com/kudefem/devogowefoku.pdf
    • https://s3.amazonaws.com/sazixipame/lewisakuvugejusituvedodek.pdf
    • https://uploads.strikinglycdn.com/files/e91663bd-42de-483a-9cc9-8c9ea0ad633f/molekurasaguwufavuzikamo.pdf
    • https://s3.amazonaws.com/lunojol/potulamuvozunurewu.pdf
    • https://s3.amazonaws.com/kozewuposoridil/super_king_flannelette_sheets.pdf
    • https://s3.amazonaws.com/zinudipir/popibiso.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_off0000d13e.bin
13bcf2c8a8ea60936dd43fb49170be7735d94390c04453c79d9ffd3bfa6ef118		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD13E 4964 bytes
font_01_sfnt_off0000e22f.bin
0c283b4104e98462200a232159af12176246230ea453e9f051753353133d3fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE22F 10760 bytes

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