Malicious PDF — malware analysis report

Static analysis result for SHA-256 75800f2ba9c9b809…

MALICIOUS

PDF

69.4 KB Created: 2021-01-28 08:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4380b62b5bd88e4b293172a6503f3a68 SHA-1: 2fa5cb38f01fa1e10e41a734fc6feeb11a78a0ae SHA-256: 75800f2ba9c9b809c18240c7bb3177daf92e0d6819b37e31ae9db1fc23ab1863
112 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically mentioning fake invoice or payment language. It also contains an embedded URL pointing to a suspicious domain, which is likely the download source for a secondary payload. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=5x+plus+size+clothing+wholesale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416496/normal_5ff925b60db72.pdfIn PDF document text
    • https://cdn.sqhk.co/nonatedogo/RihIgjv/54520289013.pdfIn PDF document text
    • http://agencymedia-ig.com/40065426096hawi8.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/dwzgiBg/ethiopian_airlines_cargo_plane_fire.pdfIn PDF document text
    • http://naturagrush.space/shark_bite_fitting_sizeseanp1.pdfIn PDF document text
    • http://mbfsopg.com/jewel_match_blast_classic_puzzle_games_free1ggv4.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/eClXuKG/nfl_tv_schedule_today_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379606/normal_6003e332a1037.pdfIn PDF document text
    • http://xrootunited.com/car_x_highway_racing_hack_game_downloadeuyk0.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/pisedij/pl_sql_developer_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/towebawarisikowezugi.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/full_detail_of_gst.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/57070909155.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/hosanna_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/lefuriwikanapepagifiwew.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/carmageddon_max_pack_gog.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/34258377270.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/econometrics_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/19333495892.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_off0000d062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD062 5340 bytes
SHA-256: 72f4cb4f2f9c32e3087e29e07972d4aa21eec226dbd43698dd240a817595c8ad
font_01_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 11036 bytes
SHA-256: 765c58153b7ec843452969b4b9cbd951c5417fbe3879a4980cd0f4dbb9169090

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