Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0ef7c6ffd0459c…

MALICIOUS

PDF

79.9 KB Created: 2021-09-23 17:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 097ddb18a59cc6c3d13a81e44e99b114 SHA-1: e610de3c4eafe49a55f9535eb6921deafeed5b6f SHA-256: ad0ef7c6ffd0459cfa1d51fe43ab87b789de1c7de4267d4d39020ada636e28c4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous external websites, one of which is a PDF hosted on a domain associated with malicious activity. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to phishing sites or download further malicious content.

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://ketchas.ru/uplcv?utm_term=play+store+on+fire+tablet
    • http://russia-ex.com/images/blog/file/pizixumagafeviji.pdf
    • http://enslev-anlaegsservice.dk/userfiles/file/20377668660.pdf
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/lexunep.pdf
    • http://rotang.net/userfiles/file/wesofatatibulasalel.pdf
    • http://uptindia.com/newsimages/file///lixomalonu.pdf
    • https://digireg.se/upload/wubupozep.pdf
    • http://dgelc.com/userfiles/file/20210912055627.pdf
    • http://njchemland.com/upload/files/satefe.pdf
    • https://billard-hauri.ch/userfiles/file/xitenozirajifad.pdf
    • http://hydrogears.com/survey/userfiles/files/jaromewaxadiduribopapuf.pdf
    • http://voyagerav.com/v15/Upload/file/20219221722219065.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16142a87a82c67---dakexogevavexugiwa.pdf
    • http://rzn-house.ru/upload/file/25473848220.pdf
    • https://12shio1.com/contents/files/66719374198.pdf
    • http://nepodoshlo.kz/ckfinder/userfiles/files/gasiguvawefegunuliz.pdf
    • https://hurghadalife.net/userfiles/files/fagesi.pdf
    • https://trieurodata.ro/images/file/48415127252.pdf
    • https://truckforceone.eu/upload/editor/file/77684814752.pdf
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/59019396807.pdf
    • http://hitelesen.com/userfiles/file/migutasalas.pdf
    • http://101-games.ru/images/uploads/files/57508145905.pdf
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/27615770988.pdf
    • https://harkakotony.hu/UserFiles/file/14715389027.pdf
    • 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_off0000d2ef.bin
3a57d554070c4f0cf4bc2181cd85e366c7077a1762fee0723bd86b14ff883e4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 17928 bytes
font_01_sfnt_off000101de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101DE 16792 bytes
font_02_sfnt_off000119f5.bin
4bcf48ec7e8d7e40165500519c6155d38f9888c7c0cae1dc48fa95f1760ef18e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119F5 10460 bytes

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