Malicious PDF — malware analysis report

Static analysis result for SHA-256 1895f1863dc85e29…

MALICIOUS

PDF

120.8 KB Created: 2021-03-17 06:27:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e22d6146f618df0a1b36bd8b04602355 SHA-1: 4c74019f57952afa90902ef0f25cd8d99a31f280 SHA-256: 1895f1863dc85e29c8a6a277db8492fd4dc2f845e2691ca25124f43d73c1d227
96 Risk Score

Malware Insights

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

The 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, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to reference printer manuals, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=impresora+brother+mfc-7840w+manual
    • https://cdn-cms.f-static.net/uploads/4479236/normal_5fe9563bb3e9f.pdf
    • http://lazadacostumercenter.com/firehouse_subs_menu_pricesvppdy.pdf
    • https://cdn.sqhk.co/lewulula/xWiiold/bebedigirusokutoteb.pdf
    • https://cdn-cms.f-static.net/uploads/4457561/normal_5fdbe8806c9b7.pdf
    • http://sabovibin.medianewsonline.com/80636633424.pdf
    • http://4338bacchus.com/wuxugiragepee4c6.pdf
    • http://hardcreditcheck.info/bapafawapafen4vvk.pdf
    • http://zozavelomidabi.scienceontheweb.net/logitech_keyboard_k120_for_business_-_emea_-_russian_layout.pdf
    • https://static.s123-cdn-static.com/uploads/4446921/normal_6004b437901f1.pdf
    • http://waliduv.mypressonline.com/homogeneous_and_heterogeneous_mixtures_worksheet.pdf
    • https://cdn.sqhk.co/zarepowake/4jejcgc/ces_2019_tech_trends.pdf
    • https://cdn-cms.f-static.net/uploads/4501229/normal_5fd250582ab98.pdf
    • http://xepuxesadara.mypressonline.com/mean_median_mode_formula_chart.pdf
    • https://cdn.sqhk.co/kozuvurop/5jf4jfE/78221369107.pdf
    • http://pogibofabut.getenjoyment.net/damolijazirirodokimokasaj.pdf
    • https://cdn-cms.f-static.net/uploads/4387565/normal_5fdae96fb042b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/popilo/aifa_ki_full_form.pdf
    • http://rosajeku.myartsonline.com/10354044083.pdf
    • http://pozidijapepore.atwebpages.com/hp_laserjet_p2035_printer_full_driver_download_for_windows_7.pdf
    • https://s3.amazonaws.com/bakoloj/90692658791.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_off0001879d.bin
a980499cab72f4758076af9cc85bd9675dd4269c6ad0ad74f14e24440093c63f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1879D 5796 bytes
font_01_sfnt_off00019b4f.bin
ecfe49b4674ed67a2476a2623da61aebf6e2bac1c3512b537c6800d75b781028
pdf-font-stream PDF embedded font (sfnt) at offset 0x19B4F 12404 bytes
font_02_sfnt_off0001c53c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C53C 4324 bytes