Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6fafbadf478543…

MALICIOUS

PDF

86.6 KB Created: 2021-09-17 10:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 58acd508a370576e744472ac297f6f5e SHA-1: ffffa46b97316631c26596fd08449f755f1470fa SHA-256: 9f6fafbadf478543b4efda275ebc23cb69ae880b0980fee4a0036718212deb51
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The PDF structure and the presence of external URIs suggest an attempt to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=best+android+rts+games PDF link annotation
    • http://studiofantino.it/userfiles/files/54830761477.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/bumorenolova.pdfIn PDF document text
    • http://workontext.ru/media/file/nifivek.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/wejilenozuwogajez.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/pagadiputale.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/16800423213.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7a2872780---70124846370.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/kisawasunefixewogi.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/98814361483.pdfIn PDF document text
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/35957328887.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/85465066520.pdfIn PDF document text
    • http://podushka.by/files/files/rejoxi.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/38689195874.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/gubibezusirel.pdfIn PDF document text
    • https://windsbs.biz/files/file/kenonovatir.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/golakamasubixiro.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/kikuxarisumosadigetak.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/dakisizogo.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/61773426927.pdfIn PDF document text
    • http://pi-consulting.ch/download/kokozenitunujunenukux.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/vuvonox.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/52227541429.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/60931491553.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/mepewuturuziluxo.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021091110241380554.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_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 10600 bytes
SHA-256: c7a8a7eecc1db38bc15aa9dbce1650f88a4e1c8637c9cbbb3432ef8ccddab4e4
font_01_sfnt_off000108b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C3 17024 bytes
SHA-256: e800a55cbdf5acb547fc8627ff71e5c8bf49babdd30eaa7839fe7899b04facbd

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