Malicious PDF — malware analysis report

Static analysis result for SHA-256 f286817a96d12f22…

MALICIOUS

PDF

70.6 KB Created: 2021-09-26 06:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 485f708f462d7bb983825d83f483d5b3 SHA-1: bd67cc5e78bee6c8069aa099d48a2dd6b0242ec6 SHA-256: f286817a96d12f221c6654686696ab3e2a977883fa9bcc88a4f757fd16977307
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The PDF also functions as a link farm, directing users to numerous external URLs, many of which are unknown or suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/83200797617.pdf In PDF document text
    • http://carbontuning.ru/file/joduxojiveku.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/pavikuvusudilinubenox.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/57597295189.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/figumegikeruput.pdfIn PDF document text
    • http://18554080.com/userfiles/file/60605795009.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/23483533963.pdfIn PDF document text
    • https://2winit.com/Files/files/13629726602.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210913_EFA39A4CB23E45F1.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/21774483735.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/32511057957.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/97163742469.pdfIn PDF document text
    • http://klemanpince.hu/files/file/fedawibufofagoj.pdfIn PDF document text
    • http://cartopack.be/Images/file/nalapijetemokezukeladikar.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/18384450087.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/gulapuzexutuj.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/dapizubaredugikisotekisag.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/19400059073.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/naxapikozuderadovafebo.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/potub.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/2349583981.pdfIn PDF document text
    • http://edallyshop.com/upload/files/zexosivigugipe.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/gokidukewoxetagaxejedul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+hitman%27s+bodyguard+full+movie+watchPDF 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_off0000afa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B5 16440 bytes
SHA-256: 664eef3da9203b47cbbc84596e8388bfebd7aaf777adab0f8ac8405908720fe0
font_02_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 11428 bytes
SHA-256: e29f95208cdf4536608a967814d83a7314e7dbdc191553b301b77f3ed83a7192

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