Malicious PDF — malware analysis report

Static analysis result for SHA-256 008000af319348fa…

MALICIOUS

PDF

80.9 KB Created: 2021-09-03 05:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bd49a6fcf4739ae222a6e0a17c670687 SHA-1: af4724020348dea6fd07c411ed4e5880bd0f8244 SHA-256: 008000af319348fa96e853cc8f9211aec16db9a20132e2b82da71cf9b138a762
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/uplcv?utm_term=socializing+agents+pdf PDF link annotation
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc6c7f60424---zowag.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/35427873724.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/nixefegegasune.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/60tu6aqjqikmet0628qlcufl7r/goxavokileb.pdfIn PDF document text
    • http://www.celso.org/download/fopiwuvinufadiwifobuvu.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jm471vrrd0ghlltaq467ickrmc/43787906847.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/98043417735.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/27060868857.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105b3938d4f6---71628256185.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/79092368804.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/83883556892.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/wunakodegux.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/58151590478.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/sidibubofapavavukelimoju.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/kowizerakura.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/rimisakakujidenumuv.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/59802193059.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/8994171855.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/iij5sdh9566vsvum9mlsjtlt23/lomodivizapaxoses.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/9601331571.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/tepizifudubifekagawebe.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd68e3996---91756239568.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/69262923076.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/56428201770.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/dibelosogofenawe.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_off0000d9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EA 10828 bytes
SHA-256: 01b3d32692aaefeea604475659c92572793ffcf34affd1dc6945c89a2b8d4fc3
font_01_sfnt_off0000f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 16760 bytes
SHA-256: 6ddef1a68a8d674bc2a1fff77c0ca6c39dd332cf2707145e6c9320b2e8f8719a
font_02_sfnt_off00011de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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