Malicious PDF — malware analysis report

Static analysis result for SHA-256 691034cec1a5aff2…

MALICIOUS

PDF

75.2 KB Created: 2021-02-23 10:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 72e4ec79f8ea0573e0c25bc31e82dd2c SHA-1: 7f406d154185f3390dcf62f6c328bac431650236 SHA-256: 691034cec1a5aff20c96e08709b13a47bf9f6fe606f7843d6303ac43ae7492e8
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'baarspo.ru', which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'how to get splat dye off skin', indicating a social engineering attempt.

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://baarspo.ru/strik?utm_term=how+to+get+splat+dye+off+skin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450631/normal_60235ac0a947d.pdfIn PDF document text
    • https://cdn.sqhk.co/loxepafigav/ihchcyU/30678641257.pdfIn PDF document text
    • http://kindraretterath.com/scratch_3._0_lessons8avjt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420745/normal_5fed10be4563a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465393/normal_5fef0ca1e449c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_603461211793c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485015/normal_5fd9013141f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_6028fe48896dd.pdfIn PDF document text
    • http://appless.space/16426231475rze37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366376/normal_5ff786c5c6e8a.pdfIn PDF document text
    • http://prizinsta.online/413337997631ndl9.pdfIn PDF document text
    • http://kernig.store/mukimevhgwil.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/moduxanakuri/26236180051.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/alternance_informatique_lyon_bac_3.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/electric_stove_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/uniform_school_bus_accident_report_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/99993910920.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_off0000dbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 5120 bytes
SHA-256: 6f8575c38b6f1b2ccf803d3fb79fe7d669c3a375d40ecb611516a01e2c16c4d9
font_01_sfnt_off0000ed95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED95 10456 bytes
SHA-256: 8bf9e4ce1b514748132529119e61523f45b7bae87c55824099654f6fa669ab99
font_02_sfnt_off0001115f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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