Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd0c7050531bded…

MALICIOUS

PDF

70.1 KB Created: 2021-09-27 11:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f24996363784dd1766cbb9f3c6d3b647 SHA-1: c1ca3ad8a7ed9c29dbea20682c7da90c85905800 SHA-256: 2dd0c7050531bded195663aa17005524c165e5de506275e9cd0b8b0a65b88c37
166 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The presence of a 'Password-protected archive handoff' heuristic indicates the document's intent to trick the user into decrypting a payload. The numerous embedded URLs, many pointing to disposable domains, suggest a link farm designed to obscure the ultimate destination of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://bedandbreakfastholten.nl/userfiles/file/tizexoluborozakenetubume.pdf
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/zoxuzufim.pdf
    • https://ecpa.fr/uploaded/file/juzuropoliwelidinev.pdf
    • https://mamotato.ro/userfiles/file/towukalevi.pdf
    • https://tommytest.dish1314.com/data/html_editor/files/95436257244.pdf
    • https://www.alapan.org/fckimages/file/37167723372.pdf
    • https://bawauang.com/contents/files/ririvudorunosu.pdf
    • https://epagneuls-bretons.fr/caningest/images/file/18435578070.pdf
    • http://geonatlife.es/ckfinder/userfiles/files/5315850347.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/xatejezapaluzixibopu.pdf
    • http://engelholm.boj.se/uploads/userfiles/files/83664806742.pdf
    • http://carywinslowlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jefowadanazofid.pdf
    • http://xn--aknmedical-yub.com/uploads/file/56984979377.pdf
    • https://otoform.com/upload/ckfinder/files/pipugumox.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/do7lkbgk1c7uno5ec5t5tda3u6/ruwoxovoxizufugadad.pdf
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/72823237092.pdf
    • http://zonazero.es/userfiles/file/tevonanebup.pdf
    • http://kahasat.cz/data/file/kevipuvemo.pdf
    • http://splhardware.com/UploadFile/file/2021090323241273499.pdf
    • https://lrsdev.com/userfiles/file/vimiwolipasizudekatomosuk.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/5490b2129aef4765f913b3adb7cf3471/1727144708.pdf
    • https://dailyiat.com/html_upload/file/73274687087.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=keyword+text+feature
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae9a.bin
6a0f68d9f84254b6a246ffaed457389409206bdfe38362513ae127a0372e9dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9A 16860 bytes
font_01_sfnt_off0000da01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA01 16792 bytes
font_02_sfnt_off0000f218.bin
3715fa1c4d014dbeaef28ff0c056747731c779ff99dbfda30677df3e99ab1e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 10332 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.