Malicious PDF — malware analysis report

Static analysis result for SHA-256 064260d72a755f83…

MALICIOUS

PDF

73.6 KB Created: 2021-09-26 00:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8d204bbe7c0305f7d0235ba1845c3826 SHA-1: bd9da86607c6e6e21c89a3cc73844d9037ff0575 SHA-256: 064260d72a755f8369ed3e455de2043a10413d578e1d1ae1c6bc0c4b3b8dfee3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for distributing malware or conducting phishing campaigns. While no scripts were extracted, the presence of many external URIs points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://dietgame.net/admin/fckeditor/data/file/20210912072024.pdf In PDF document text
    • http://ayrh.internet-match.com/upload/files/xabitelapoverojuviw.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/mitegobemoxevakifajo.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/zawalisod.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16141843532f92---19633854705.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/zijopepi.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/69764481100.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/9292545432.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/65697480826.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/38450574528.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/mafosaniwumadasa.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/ragagar.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/sajagojegitumixogokutu.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/3000465784.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16141adef1515f---foxumowuxu.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/12620278892.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/41783163211.pdfIn PDF document text
    • http://cycling-software.com/files/file/mipaweziwi.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/80183545516.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/vemovazemakunibebalasuj.pdfIn PDF document text
    • http://champagne-ardenne.annuaire-regional.com/ckfinder/userfiles/files/85989553142.pdfIn PDF document text
    • https://southafricapools.com/contents/files/fafokasisuratane.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63424338064.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/51689493520.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/pubinobugeleponeva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=android+factory+reset+data+recoveryPDF 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_off0000b94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD165 10584 bytes
SHA-256: 52bf839223e0188ccefb530cb6948e2a9a80163d3879714731d5dcece676af6c
font_02_sfnt_off0000e9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BE 18220 bytes
SHA-256: 08e8b2d1c2acc8c06ede5c166f4022ed392fe631ae80a57cfcc4c8a543a4185e