Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0bb184fe1b1e85…

MALICIOUS

PDF

87.6 KB Created: 2020-11-13 11:31:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8732753c196ba9361121678ae92bd86 SHA-1: 5db81b7606fd84e09af29fa7718ab3c4de5f299f SHA-256: bb0bb184fe1b1e8541bb464689209ff1cb5faa9a5b634878f98f559a2df21234
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. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of an external URI heuristic further supports the attempt to redirect the user to a potentially harmful website.

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://traffine.ru/123?utm_term=quotes+about+bravery+and+strength
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5f9d1c31ab4a4.pdf
    • https://nugaginidej.weebly.com/uploads/1/3/4/4/134475369/9266ec42bafd0f.pdf
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8741eb924fe.pdf
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f8e0a26b298b.pdf
    • https://cdn-cms.f-static.net/uploads/4448538/normal_5fa4824b0548a.pdf
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5f97ed5c6f073.pdf
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fa9e2d96388f.pdf
    • https://cdn-cms.f-static.net/uploads/4380528/normal_5f9234479f95b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dazemi/prayer_for_first_reconciliation_free_cards.pdf
    • https://uploads.strikinglycdn.com/files/fe4b6cbd-0460-4193-bf20-c11d0f592eea/into_the_wild_study_guide_questions_chapters_1-5.pdf
    • https://s3.amazonaws.com/bepukuba/periscope_download_for_pc_for_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/1d522225-e178-4b14-9201-4103ddc8a971/wopenegukewawe.pdf
    • https://uploads.strikinglycdn.com/files/b70f7509-7c3a-48d0-b2e9-a5df25f5a75f/popexeniragu.pdf
    • https://uploads.strikinglycdn.com/files/b1e174ce-f50e-4c9f-842b-11244fe7bfe2/zenonia_5_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/6044a32a-c61a-4815-844e-fde774ba83a2/17861956111.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_off00011913.bin
2b8fb3fc29da019d58219bb970f21bbf2f303b22729a2c69667b42c7ae3febc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11913 5416 bytes
font_01_sfnt_off00012b7f.bin
cff8d66eb428853744815cd92d25b7b1683407477a424c8c32479751d89770f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7F 11312 bytes