Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bc30744b77ba5c…

MALICIOUS

PDF

86.8 KB Created: 2021-03-12 04:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82867fe8b1c9581d087d6e8e0e8d2d24 SHA-1: 7a3890276afeab5d425fc12bdb0b49b60ec1d160 SHA-256: b5bc30744b77ba5c8f25a25621582cb3904684acdca68cefddcb1764b15ddecc
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely to deliver a secondary payload or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit vulnerabilities or trick users into visiting a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=what+is+the+shred+diet+menu
    • https://cdn.sqhk.co/wexovezojab/hdxhejY/jarep.pdf
    • https://cdn-cms.f-static.net/uploads/4406168/normal_601ce1b654ff6.pdf
    • http://jalazekesofijot.medianewsonline.com/80566796658.pdf
    • https://cdn.sqhk.co/xemugugafot/jeokYjc/sopawixepazasinapuk.pdf
    • https://cdn-cms.f-static.net/uploads/4449987/normal_60214d8eac6de.pdf
    • https://cdn-cms.f-static.net/uploads/4370275/normal_602471bbe49b7.pdf
    • http://conicppjry.bid/how_to_heal_acl_surgery_fast5jb3v.pdf
    • http://avlto.best/13148023388azi1j.pdf
    • http://remont-kvartir-otzyvy.moscow/60211125548xvszq.pdf
    • http://lovefoxesi.iblogger.org/nigidagat.pdf
    • https://static.s123-cdn-static.com/uploads/4476302/normal_5ff8fd44b53a0.pdf
    • http://persequen.com/how_to_read_the_bible_and_understandb0bkn.pdf
    • http://ponaxamewimenul.sportsontheweb.net/auriculotherapy_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://disorasejazamu.epizy.com/69708492489.pdf
    • https://s3.amazonaws.com/feborobegibew/lovum.pdf
    • https://s3.amazonaws.com/fajixe/journalist_news_reporter.pdf
    • http://velosipu.epizy.com/dowiradajafoda.pdf
    • http://bidusibebawuz.onlinewebshop.net/80085097574.pdf
    • http://xologikaju.atwebpages.com/gilozuxa.pdf
    • https://s3.amazonaws.com/zodawanuror/sds_sheet_for_clorox_toilet_bowl_cleaner.pdf
    • http://xilijimerufosat.rf.gd/94145954699.pdf
    • http://zijiwaras.onlinewebshop.net/can_a_chicken_with_a_broken_leg_heal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b84.bin
fc692767e88413071344e9d29d365b1d0f9ebf0eb6c8bfb301720dd0ddd26f4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 4820 bytes
font_01_sfnt_off00011bb0.bin
305b23684ba8c396e51d13f159befe20c2ebfb553c829e0d66e9ddab11347af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB0 10432 bytes
font_02_sfnt_off00013f87.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F87 4324 bytes

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