Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0e7b9a50368026…

MALICIOUS

PDF

80.2 KB Created: 2021-09-20 21:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 47d0b175c583e189fbf93072e96110a5 SHA-1: 14750854413409107ede2c17d4dfd7cec8c4a5c0 SHA-256: ed0e7b9a50368026f137c963ab6c6d0a3acd7a45081f212be485fa50bb175d1e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to suspicious PDF files hosted on various domains, suggesting a link farm designed to redirect users to malicious content. The 'utm_term' parameter in one URL suggests a potential phishing lure related to 'recovery project android'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • 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.
  • 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://beytarimcilik.com/admin/editor_resim/file/80664135707.pdf In PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/42385181494.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/5ea4982b8c4e520bd23bb14bd079a22f/bozawev.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/86053234444.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210910_DE6EF1A0E2F106A4.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/pexalefakisorisudu.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/73340921281.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/10866485062.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/virivojibebasim.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/93639020793.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/povalipodudidufozumenek.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/10779696408.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/toxunasetetago.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/wisomikotudiveno.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/88312261640.pdfIn PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/papigusurobutodun.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/55147432369.pdfIn PDF document text
    • https://siliconautomation.com/userfiles/file/besarigil.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202109070810268300.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/70462379394.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/nmralktrpp8dbitudhiu81d8h5/tivurari.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/kosoj.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021941529504220.pdfIn PDF document text
    • http://autoservizimensi.it/images/fck/file/58248150935.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/40144195600.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/ridexevosanuvesi.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/xilugavelidomasujukibusom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=recovery+project+androidPDF 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_off0000d4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FF 17600 bytes
SHA-256: b877f6d48fd36ac96da4ae3b0f77f70c63c6a47695326f7e57bbae58faf0212a
font_01_sfnt_off0001028a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA1 10648 bytes
SHA-256: 3075a8a422bfa70f37e33899a427d05c0ef84f1a7266d25fea88cccaa8e06420