Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47e3782200f3eb6…

MALICIOUS

PDF

83.2 KB Created: 2021-09-20 03:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9bf16f7d4f8618ab2fe03dba5796df47 SHA-1: 51c2071ab4a103262db64df16f1ecfb92135763f SHA-256: e47e3782200f3eb6dee1a0a937a311672117bbc47e8e3f013f410f4c4c043347
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a payment redirection lure and a link farm on disposable hosting. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest an attempt to redirect the user to a malicious PDF, likely for phishing or financial fraud. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16147be81bc270---11819220691.pdf In PDF document text
    • http://moriefrusca.com/userfiles/files/50437569506.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/xazevirudowinugumawa.pdfIn PDF document text
    • http://reopen911.info/media/file/fekeguxavejeliwipat.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/gaxupezewixolepila.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/22023073752.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/41275788976.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/84340075413.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210914120944.pdfIn PDF document text
    • http://juentai.com/userfiles/files/70495472181.pdfIn PDF document text
    • https://suruburi.net/mm/file/50435165361.pdfIn PDF document text
    • http://pasaru.com/upload/files/55766755580.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/ecda9c7b223c74602357b24a56789245/tipejutipawizazofizugev.pdfIn PDF document text
    • https://sd-olimp.hr/files/zixodi.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210915140545.pdfIn PDF document text
    • https://ckfinder.pamlskovnik.cz/ckfinder/userfiles/files/25021538868.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/20916361123.pdfIn PDF document text
    • http://mcutech.net/upload/2021/09/file/1631843874607761041.pdfIn PDF document text
    • https://karaari.leaddeehub.com/userfiles/files/60551714311.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/52432668774.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/31155590152.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210916221854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=redeem+codes+on+nba+2k+mobilePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 17708 bytes
SHA-256: 9fd94abb967f85ee60891cc533a170fddaf9c88dc48ab7b6c7d1b45c77cdfe07
font_02_sfnt_off000126f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F8 10732 bytes
SHA-256: 458eb6bc1feae199cec14bfbf7362deac3a5043d6538d34cf525cfbd9af8a7fe

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