Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb449e630f66776…

MALICIOUS

PDF

70.2 KB Created: 2021-09-29 05:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 754cddb4f733942279c7acf96a55a6ff SHA-1: 48fbf05e0179a78d346c70c4a2ed2b07f50a4de5 SHA-256: beb449e630f66776b7b8860a57ccf69519ad2ad9c9446942d43af6a75d2facdc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://crbz.ru/userfiles/file/garotepamezinelizo.pdf In PDF document text
    • http://canxetaidientu.com/images/file/zedulugisefofizilure.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/gelotun.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/rasinanedanetoperi.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/96680484442.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/8547815419.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/gunokaxukov.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/nilukamepenuvumadule.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/gijuliwefurukabufazomiru.pdfIn PDF document text
    • https://groupits.cm/uploads/fck/file/20943931525.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/kivizinovoripudaj.pdfIn PDF document text
    • http://lejuriste.ru/files/file/67642557274.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/70470830518.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/64412867602.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/jifitupatavoxewevaban.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/14130124209.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/13239211622.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/bafoxiseda.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/99183710840.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/27901948709.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/29325412115.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/regidofofasunusizuzokoxi.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/3096349adc599fa07d5d092d2e9428be/gululudexonozedekudomumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=fifty+shades+freed+stream+onlinePDF link annotation
    • 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_off0000b0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC905 10708 bytes
SHA-256: 6b1a52559b4646cfc480c039c3990aef9f46e9096cee04464c2b294ba2f2fa3e
font_02_sfnt_off0000e161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 15616 bytes
SHA-256: 275934cc5ec1ffe4773a53c793c52f43b8d8d78aca73d1eae52977f37eeda613

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