Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f05c8d46eb33b8a…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 12:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b020b26ccf1aed08afad0ec5f125c4fc SHA-1: c1a1347448e19cbd918843ed757903f1fa17bdcf SHA-256: 2f05c8d46eb33b8a4ff3fddd8c46878879657cf4bed60fa92554c8b286a2d2a5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URIs, many of which are part of a link farm hosted on disposable domains or directly point to IP addresses, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of multiple external links and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://huntic.ru/uplcv?utm_term=gangstar+new+orleans+diamond+hack PDF link annotation
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161391f2d5ab7e---jiderofokumabagegarev.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/73303572224.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/71355225118.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/1602953050.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/wamofimugis.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/69762054921.pdfIn PDF document text
    • http://perksys.com/userfiles/file/85420513025.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/vibifape.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/lipedemenudofi.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/mowapesuvegip.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/41979619556.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/12968814425.pdfIn PDF document text
    • http://hkacca.com/userfiles/nenovagebijuradiwu.pdfIn PDF document text
    • http://splogservice.ru/content/files/pagorelaweluz.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/gexopalinusu.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/96373791495.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210917_171131.pdfPDF link annotation
    • http://permagnet.com/upload_files/file/2109061551248322308x2ri5.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/94218280610.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/dijezi.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613936512e3d9---38365007542.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/72200474462.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/4931403682.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_off0000d8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DC 18492 bytes
SHA-256: 0ab7910655cff2b94ce9f9c5c0f8333930fc89a5a6dce7cb063c6ebead114bf9
font_01_sfnt_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 11032 bytes
SHA-256: 029f45c7b5252b105683554b4c613c9095de7af1ffcc94ecbf8fa87434db0b3b
font_02_sfnt_off000122e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1