Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bed0e248387fe64…

MALICIOUS

PDF

68.7 KB Created: 2021-09-25 02:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f98c2866e3d68e778b4b99cab53edab0 SHA-1: 3cf97e4c4ee7c665ab5523d2ae169159f1600777 SHA-256: 5bed0e248387fe6460e1f50ecc919b402da9477914649501532bf7af96ee1bb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=free+games+hill+climb+racing PDF link annotation
    • http://e-sportis.com/images/upload/84860622032.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/rdj7hfdk9stiliruu06k551u24/15369596535.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/77728599209.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • https://elnativocoffee.com/silver/upload/files/52176376475.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/55541829680.pdfIn PDF document text
    • http://yoron.net/up/files/29797479520.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142a6b1a223f---66488585064.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/32819610659.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133534b31201---82314352036.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/41482998629.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/14522682164.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/92683299168.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/67580694353.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/2028166327.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/63286294754.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/79666719202.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/keronidafutiwasololimejan.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613610d99bcda---gagabagajijerijebifagesi.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22114285726.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/87819790154.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/p6gplf2djpfhlk7p27a72evhl5/89506949647.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/fejisig.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/majadaxumuxeve.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_off0000afaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAA 10576 bytes
SHA-256: 6aab8c01a6de20b225c41e4b1c14bb5751d82efe288c6569c2d47e7a16c1b945
font_01_sfnt_off0000c782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC782 14976 bytes
SHA-256: 9b1f4c5195826d065c3fc12c1451b55cbdbe1936e8d73ee1b0a7a5ef980eb2c1
font_02_sfnt_off0000ed90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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