Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a9fcfa0bb4d9d7…

MALICIOUS

PDF

73.7 KB Created: 2021-03-28 13:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69ca790006ba9b6fd047a9e3834c3b8b SHA-1: af3bd946f29b247d8d02983cb8b5a27cdd175f9c SHA-256: 27a9fcfa0bb4d9d7effc27b5570ece26ce06e28cfdefacd17b87fb5a37e0c14b
96 Risk Score

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 URL pointing to 'resalured.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'broadcasting script'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=broadcasting+script+english+2019
    • https://cdn.sqhk.co/luwagoma/cqLd4YL/kusapikitomin.pdf
    • https://cdn-cms.f-static.net/uploads/4444622/normal_60594eac10912.pdf
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5ff9a7440b052.pdf
    • https://static.s123-cdn-static.com/uploads/4421200/normal_5ffcbd05394c2.pdf
    • https://cdn.sqhk.co/tumupowe/Eljihga/64293816343.pdf
    • https://cdn.sqhk.co/mewedenemez/5gdgcgA/76384018915.pdf
    • https://cdn.sqhk.co/vonewesipan/XKQibB0/8905438081.pdf
    • https://static.s123-cdn-static.com/uploads/4468553/normal_5fe26fcf93b5d.pdf
    • https://cdn.sqhk.co/xatuxazaz/Ao1i3ha/zombie_shooting_gun_fighting_games_fps_2019_3ds.pdf
    • https://static.s123-cdn-static.com/uploads/4473432/normal_6007ad7e7ef94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vanatul/32253192305.pdf
    • https://s3.amazonaws.com/wupixufekijax/toyota_alphard_2004_owners_manual.pdf
    • https://s3.amazonaws.com/vibasujefir/joey_graceffa_book_in_real_life.pdf
    • http://muxolisakij.epizy.com/27910147594.pdf
    • http://mupefapakag.rf.gd/lijavaloguvolezotut.pdf
    • https://s3.amazonaws.com/zepifudoxapo/jixasabojutije.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_off0000de7f.bin
d5f353bdb31f09392c6d79ffb5b26a48f197f39d9f34b939df6e38495adc495a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7F 5864 bytes
font_01_sfnt_off0000f271.bin
b62a383a67fd99e965c2e890e85d664a7d7d7d5981d74ea4a6d2f63e9d8dd860		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 11632 bytes

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