Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9142305eb0cd21b…

MALICIOUS

PDF

80.0 KB Created: 2021-02-11 16:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 851d1dac99c2034942f7bff525174700 SHA-1: 7c5cd15d0fe37af85c3050ac92fa09bfa708f499 SHA-256: a9142305eb0cd21b605c6b1cdc2986e3de21b9141e5985eddfd05aa6bef408b7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://jottigo.ru/123?utm_term=kissing+the+witch+pdf', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, suggesting it's designed to conceal its malicious intent.

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://jottigo.ru/123?utm_term=kissing+the+witch+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422645/normal_5fddf76898435.pdfIn PDF document text
    • https://cdn.sqhk.co/xivijela/ieTFieH/coloring_puzzle_games_sp._z_o._o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464722/normal_5fcc18ee49924.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/gihb2mf/free_wifi_at_home_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_5fe76241b3de0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421623/normal_601672642e57a.pdfIn PDF document text
    • http://jazulivorif.iblogger.org/19375829477.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/wizuluworafid/cymatics_titan_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/been_together_d-_day_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/zagisibenikabuwixiv.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/maths_exercises_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/dna_deoxyribonucleic_acid_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/thesis_defence_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/1483556990.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_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 5140 bytes
SHA-256: ae574446506fa6299f277f4c22df94f7157000d11cf6a6e309fce825bc230288
font_01_sfnt_off00010d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0B 11604 bytes
SHA-256: 2ddb589ce3f76713e4682db2d88ad49a609bf3cbbf52305f8f59d0126d54c929

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