Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8f60fa4bd2975e…

MALICIOUS

PDF

69.7 KB Created: 2020-12-11 10:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5df79096d254a8fd34f92a60d48515c2 SHA-1: 20528a40ede8be8d28ae73b36ba62c18575c0717 SHA-256: ef8f60fa4bd2975e9b4ac2a72b2147d6e91fe67f368ccec2bbc3aac33dd21d4c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'traffset.ru', which is likely used as a lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware distribution.

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://traffset.ru/wb?keyword=mount%20athos%20contact%20information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476272/normal_5fd3156677ae5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f88159360d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5fb89a1a994d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/tangled_i_see_the_light_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/intellij_add_javadoc_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc551db5bcb0228a29fd4f1/t/5fc67f739d793648406e2dce/1606844275879/28096094391.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/3387609654.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc534b727a199023ad18a8a/t/5fc77b0c5060c93fcd7f59b8/1606908684839/electrician_apprenticeship_program_portland_oregon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0b373fdc31513a1196f7/1606224697397/hahn_appliance_outlet_inventory.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1ac43f75b166439d8390/1606294212778/singapore_math.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50f32ea4a794d565fe5d6/t/5fd1bebd87bef85997edcbd4/1607581373444/walking_dead_cast_season_6_episode_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/25661937344.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc007c924b06a7eb3fa3bc3/t/5fcb5450da45e86ccaa1be1c/1607160913369/tunein_radio_free_app_for_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/toys_that_start_with_sh.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD514 5092 bytes
SHA-256: d7e94b5631da55f88f829c6dbb523f5c1969c6fa47fc81017b10234622e32e9f
font_01_sfnt_off0000e64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64B 10380 bytes
SHA-256: 2d5e5295f95675fe0970497df1cd6e4c4b56af84084f639347d3124c13772618

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