Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baa9df35f8b96b7…

MALICIOUS

PDF

69.8 KB Created: 2020-11-19 22:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7ee25e91f51f950572a268301f6b083c SHA-1: 3d2d0b46d2c322980e93141bc503de4fd1400a7e SHA-256: 2baa9df35f8b96b789a9a9071db2d1b9b58d7b33955205561c73419f5dbd4b13
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and ClamAV detection confirms it is malicious. The document body, though heavily obfuscated, suggests a lure related to a 'blank result sheet'. The embedded URL is likely intended to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=inbody+270+blank+result+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5fa318c32f589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465147/normal_5fb3e871c2268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394068/normal_5fa0c81f2aad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5f96bce9601ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_5fb3f4aabd66a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411918/normal_5f9e3766e37a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jezekemunidup/gb_mart_salem_va.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/mainstays_tension_pole_shower_caddy_install.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/alcoholismo_definicion_oms.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/kevijudafu.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/topology_optimization_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/fupemesugufefujubi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A4 5344 bytes
SHA-256: 0b23205da6b49656a185ff4a9123da83cb735483ed1d274d0ec01e20f3310d15
font_01_sfnt_off0000d8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CB 10460 bytes
SHA-256: 4fe9c4f5934f2b1cc3ae42521a3d379cddf318569c83c7b1d9ae6165cf6b1167
font_02_sfnt_off0000fc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3