Malicious PDF — malware analysis report

Static analysis result for SHA-256 5314fe456dfde30f…

MALICIOUS

PDF

70.8 KB Created: 2021-09-24 18:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6e1027000708a7ac873e48b5f3f5bb8f SHA-1: d414086c7ed2764769060194d5ef2bf1565c4cf2 SHA-256: 5314fe456dfde30f294313171a8cf7f0dc6ee984194783b88a5d6e068fac5d08
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm with numerous external URIs pointing to disposable hosting. The document body is heavily obfuscated and unreadable, suggesting it's designed to obscure its malicious intent. The primary attack pattern involves directing users to external URLs, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/uplcv?utm_term=minecraft+mod+apk+download+latest+version PDF link annotation
    • https://ncvpte.in/userfiles/file/64369235359.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/23766262537.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/44187426127.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/xibalufizibak.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/308jdbcdo83608hjubjfi1n7vc/fitosuvaxixux.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/xopixetamefete.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/bezuforawujorumezawidubo.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/96085093384.pdfIn PDF document text
    • http://393citizen.com/upload/files/94977212394.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/40625360930.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/febokadukifama.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/8277328096.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/gukebiwevova.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/bodapaxawaxusetefada.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210903_ED088462352B056A.pdfIn PDF document text
    • http://news-hk.net/uploadfile/file///76124970527.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/79970526468.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef882f1518---65479039488.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/13069920929.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/44831522346.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109061002297465.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-09-05/ed8b9e4ca961966c5f4a34cc44c66d60.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/33655501281.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_off0000b1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CC 11020 bytes
SHA-256: aa18e8b7607ebf0da87a9fd9394ade7875f5748bbb8d549949653087ccda59ca
font_01_sfnt_off0000cb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB77 16344 bytes
SHA-256: fab1646d2d6dcd3bcd93c1fecacd6882a141ee7e6ce51b355f1ceeeff7b9c144
font_02_sfnt_off0000f52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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