Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80344d57e6d34a0…

MALICIOUS

PDF

73.6 KB Created: 2021-01-26 01:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 725e541f7a8486a46de24bec6a08b51f SHA-1: 535d27911d185ae0f15a2ce81f333210c5a220f8 SHA-256: b80344d57e6d34a09f4be665aea5c37556e8419ccbac3c8baef5e3b04718ecb4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious URL, likely intended to trick the user into downloading further malicious content. The document body is heavily obfuscated, but the presence of PDF-specific heuristics and the overall verdict strongly suggest a phishing or malware distribution attempt.

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://seumenha.ru/123?utm_term=gravity%2527s+rainbow+guide+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467950/normal_5ff448efeb5aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472775/normal_600917eb0c887.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/fnlgegg/far_cry_5_plane_controls_are_terrible.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392442/normal_5ff950604a5a1.pdfIn PDF document text
    • https://cdn.sqhk.co/bepifopid/Ligjajd/the_sims_3_skills_cheat_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolapapuziku.epizy.com/17785699039.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/75687036074.pdfIn PDF document text
    • http://kudogal.rf.gd/danganronpa_v3_character_gift_guide.pdfIn PDF document text
    • http://rozazidugo.epizy.com/california_king_size_sheet_dimensions.pdfIn PDF document text
    • http://mamitepibo.epizy.com/lagu_lily_cover_hanin.pdfIn PDF document text
    • http://luvibiw.epizy.com/tekokukovodukewebaxes.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/old_bengali_film_video_song.pdfIn PDF document text
    • http://wirizobesopo.epizy.com/bokenasapubabogim.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/bajibunibiligovelasome.pdfIn PDF document text
    • http://bojifif.rf.gd/arundhati_telugu_film_video.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/java_8_parallel_stream_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/constitution_test_study_guide.pdfIn PDF document text
    • http://folizel.epizy.com/austrian_empire_military_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/18930572946.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/63543260986.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_off0000e080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE080 5636 bytes
SHA-256: afc2284c0bf9eb9bd8ff5fd660cf1b314242fc60a161752f1dd3a816c3a7b87d
font_01_sfnt_off0000f3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E8 11016 bytes
SHA-256: 9a6a3bf77e1806f6646926cc1efcf9a42318e7d8c7604107103e2540ba132a7b

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