Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce220e151c3afe8…

MALICIOUS

PDF

69.1 KB Created: 2021-09-27 04:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a00c41070de8e395a5d951bb387e4cad SHA-1: fa2b7404044a039a124f06f659e728151da98bf7 SHA-256: 6ce220e151c3afe8de5ec116a745b1a55d8d2b56d9bddc313d9e08e046e0aae9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to malicious websites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://infrive.ru/uplcv?utm_term=assassin%27s+creed+3+free+download+for+android PDF link annotation
    • http://zeci.nl/im/image/pidirikuvazonuzetufuxa.pdfIn PDF document text
    • https://corpus.bg/files/fck/file/lolexadefanofora.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/zabitefijajuna.pdfIn PDF document text
    • http://uniondrygoods.com/fckeditor/userfiles/file/17741615518.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/28380798671.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/ecb58qp5n7qudnm3s08jocnvsq/16905604170.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/vipokamebifonomifizegi.pdfIn PDF document text
    • https://mattress-leader.com/media/xiburotebopa.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-9-12/20210912012511939086.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/77040350669.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/6793023869.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/zifutomitaduzug.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/zevunax.pdfIn PDF document text
    • http://hig-hegmann.de/userfiles/file/57061412042.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/61672984109.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/bazigalafemivusat.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/1t47pm8gb1vsgjmmtik9fh62a2/50980814722.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/pororogemawokiw.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/62708942241.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/40344116329.pdfIn PDF document text
    • http://pskov.agisinfo.ru/uploads/content/files/lugezijodifok.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_off0000b057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB057 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC869 14856 bytes
SHA-256: d1669d369374a561da72816b2eb85959d02691f7316384dfc0e41e479b03491c
font_02_sfnt_off0000ee21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE21 10644 bytes
SHA-256: de6d60c2cf767bc7b2487347d62c7b4f77684359e62f823ade867d93420202ec

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