Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f022065b5c3d78d…

MALICIOUS

PDF

65.3 KB Created: 2020-12-21 16:23:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 936b11620b7571f97737c144696dd12d SHA-1: 7bd45de74935cecfb6e99ab5821fb3f807e2b0fa SHA-256: 2f022065b5c3d78d51dcea280fa45c6e804725b4e9c603c502110cad66e3c189
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, appears to be related to 'books for sale', suggesting a phishing or scam lure. The presence of an external URI and the ML classification strongly indicate a malicious intent to redirect the user to a harmful 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://trafftec.ru/123?utm_term=al+anon+books+for+sale
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5fa609992c72c.pdf
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/banaraladaje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2fdcfa3a-3705-4b59-a625-35b5d8c90cdc/fafupidutanesiropub.pdf
    • https://uploads.strikinglycdn.com/files/1a56f3d2-afa4-432e-8dfb-898c1ebeb169/kofusajikozisusopeto.pdf
    • https://uploads.strikinglycdn.com/files/9b4577ff-5199-4378-beef-62285f1418f2/nomopilivifutulamumik.pdf
    • https://s3.amazonaws.com/kigavanus/biwukofez.pdf
    • https://uploads.strikinglycdn.com/files/07a624e8-d8da-4e92-b70f-22a4511cbee7/chatham_county_ga_property_tax_assessor.pdf
    • https://uploads.strikinglycdn.com/files/84df5f02-bcc3-4fd5-919f-305f5c943900/signalr_sql_server_backplane_perform.pdf
    • https://s3.amazonaws.com/fosawef/pipatirepit.pdf
    • https://uploads.strikinglycdn.com/files/3f70d5cf-989b-42a8-9fc6-de63a07b7291/qualcomm_atheros_qca61x4a_driver_update.pdf
    • https://uploads.strikinglycdn.com/files/dbe4dc20-e9a0-4bb5-97ba-3b8bfa36f270/synonym_for_replicable.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_off0000c5b1.bin
a5f2331808c0740b4796807e8c61bb002a868c21410fa53435deeece982e7460		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B1 4952 bytes
font_01_sfnt_off0000d699.bin
dfd4e96b3bea7a577dfb86724e09a9971562f6357dd41fa3938f7f0c9d72393d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD699 10012 bytes

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