Malicious PDF — malware analysis report

Static analysis result for SHA-256 224d45574fbed7f3…

MALICIOUS

PDF

79.9 KB Created: 2021-09-20 08:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0e6d7e07ca62f81aabdb868a1d10fc03 SHA-1: e40fa54e3ebdd2486a78ed7757eb5f6d663ab954 SHA-256: 224d45574fbed7f3d80cabffe40bc161d326824e9c67a18a83364abd37c36169
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs pointing to external domains, many of which are structured as link farms or disposable hosting, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a large number of links on potentially untrustworthy domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=step+up+5+vf+streaming PDF link annotation
    • http://harasim.cz/uploaded/files/xofibebalatabokeriko.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/gigipid.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/dixutotuzojusolo.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/gigibenurasifikevi.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/zumelinodil.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/gefifonevidep.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/xadexopufudavek.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/revobevusopubodut.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/magedurujewonogizofe.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/famija.pdfIn PDF document text
    • http://hingliltd.com/userfiles/sebitekejeluzinadu.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109191815404169.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/mawabiku.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/dcad4dcf297961df2013da351c9162b1/96356591144.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/80295172420.pdfIn PDF document text
    • http://ozcetinler.com/userfiles/file/20322409282.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/mepekapabaduzepovusu.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/funefale.pdfIn PDF document text
    • http://saint-party.com/media/file/84359473187.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/56913909283.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109121427581351.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/jevozidunu.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/bb3e0f1eef2fb1f2c64dd9ed448bc424/fixapurin.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://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_off0000ce4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 19436 bytes
SHA-256: b82eb760fcc66d3e718beef0a36571e83c35a221c1d8f21ca004475e3f3922b3
font_02_sfnt_off000118ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EF 10908 bytes
SHA-256: 96f0895f2fb1256893b8422ac8b1fd27f743a27d60177955e70da80460bb8981