Malicious PDF — malware analysis report

Static analysis result for SHA-256 95226b80232bcf9d…

MALICIOUS

PDF

70.2 KB Created: 2021-09-28 19:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7a93f977b1dae4e7f23b9131e7901998 SHA-1: fa58d53ff2e4bbb01475f9ad2db629c6a9228b19 SHA-256: 95226b80232bcf9d6f36bf0a5a93f2ba737c299c78551be47cf2a22e5ded993d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which are disguised as file download links, and is flagged by ML and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to 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://archism.ru/uplcv?utm_term=recover+deleted+files+from+phone PDF link annotation
    • https://condominiovillage.com/userfiles/file/8244491316.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/ziwafudubitupakatomar.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/84517398885.pdfIn PDF document text
    • http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210917_024650.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/fenijagatezovo.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/376347400.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/10177093080.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/bogevavilemewawil.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/sejupifo.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/ce19e4cf8694e93995531975d85c8852/45515659958.pdfIn PDF document text
    • http://tech-in.info/bramy/userfiles/file/24559759283.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/91669577308.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/43778730719.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/tefebotifudotuwor.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/zepepe.pdfIn PDF document text
    • http://koddous.com/userfiles/file/3455073609.pdfIn PDF document text
    • http://onlinevay.com/upload/files/bozedugumum.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/komosobiduzasuta.pdfIn PDF document text
    • http://savemaxint.com/files/file/xudafukusav.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/95236538219.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/sejenodepikuzikimiga.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/bolasonej.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/tiwenosoterorotakej.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_off0000b0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CC 16164 bytes
SHA-256: dfbe35b1c08a612288d56353df211ef4fe111ee98c45ad8482c0467aeb78844d
font_01_sfnt_off0000d9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C3 10836 bytes
SHA-256: 8d961a0a79847a8a994ada5663801695c65d2f2c56450ff3dc3a7a1590a8a3da
font_02_sfnt_off0000f292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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