Malicious PDF — malware analysis report

Static analysis result for SHA-256 008be8c11dcbeac9…

MALICIOUS

PDF

86.4 KB Created: 2021-09-13 10:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0bdbdc9d1d7eb7750b11a5f8ae2ec161 SHA-1: a13450485fc7d52a3ff021e76d080bcffcd7c7fc SHA-256: 008be8c11dcbeac9d7d957cacffa363dfeeb41fc357cc5aa4febfa16dcf7cd64
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded URLs, many pointing to disposable hosting, indicating a link farm or phishing lure. ClamAV and ML classifiers strongly indicate maliciousness, specifically a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://crysiq.ru/uplcv?utm_term=good+anime+apps+for+android PDF link annotation
    • http://pm-ural.com/uploads/files/gexixapodinijulojuj.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/gojofawegakusituvaxok.pdfIn PDF document text
    • https://yellowstonewildlife.com/bubowilupilonowisazoz.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c27928fef9---25443154384.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/81329402244.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/sozuluturisonamebiduzep.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210903230530.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/17963258866.pdfIn PDF document text
    • https://dacola.com/upload/files/54605020554.pdfIn PDF document text
    • https://actor-conseil.com/files/file/gonefajesiz.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/nizatuzot.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/61738577302.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/74259682630.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/bunifugibeg.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/77597258751.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/b53eaaaf3654aab5a88915bdaa79bef9/41399053830.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/35604028898.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/54177601.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/35412058301.pdfIn PDF document text
    • http://restavracia02.com/userfiles/file/36820340159.pdfIn PDF document text
    • http://skene.es/userfiles/file/41435353702.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/xujodomiwi.pdfIn PDF document text
    • https://saptabangunmanunggal.com/indomobils/upload/file/67961663340.pdfIn PDF document text
    • http://st03.it/userfiles/files/52642525973.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/bujidisuluzalemudegapu.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/fitapuzakulakidelerum.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_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 17696 bytes
SHA-256: 505ad3f1a75d1d8548b55ad0d90c338f9465310480543ebce3739af9f0ea48ac
font_01_sfnt_off00011ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA7 10556 bytes
SHA-256: 7760c3e8e428e44164c15083d3d32fbaec7416022f922e83446a442b38f4597d
font_02_sfnt_off000133a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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