Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ca2f0e84fc7da3…

MALICIOUS

PDF

75.2 KB Created: 2021-09-09 13:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f2aa6c4de0030d9f1079c9894e965dfc SHA-1: 7b6c2d2433d5805b24bafd36d0de219d1a4fbbdc SHA-256: d1ca2f0e84fc7da37f01dc5b4bf3ee50c1ca9977d423fe751376a37377ec7783
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to PDF files on various domains, suggesting a link farm or distribution network. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://sun-tes.ru/files/file/jetamuxigino.pdf In PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/xikitawaforufex.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/miwekufozerurorujaferov.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/34505636495.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/xovemilogibumi.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/30413412563.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/loramizibarunavovipas.pdfIn PDF document text
    • https://rintrans.com/files/tevizoserevojumokobe.pdfIn PDF document text
    • https://clubon.top/uploads/files/87851155667.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/58156542201.pdfIn PDF document text
    • http://runwellconsulting.com/file/file/39032833272.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/34653792875.pdfIn PDF document text
    • http://bulmarconsult.com/files/daxuzozogegozafanagalipu.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335dc5965c7---tokakubudepul.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/lubopesujuxawu.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131db369cae4---20335721863.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/46727501293.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/70151462100.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/bidojawo.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/3019330719.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/nazowunulewowemopi.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/tokefinekelugobi.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/24594299772.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/65611935796.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/luzoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=battery+widget+reborn+apkPDF 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_off0000c376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC376 16356 bytes
SHA-256: 265a135688ce3b89af88f0213f5dd20c47aee60aecd8aa729926f654f9a88f61
font_01_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10622 10836 bytes
SHA-256: 45d3f2bae604e44f3e4a48e1a224bf3014fac5fc36ab1ae2977d7303b3c6c3a8

Open this report in the interactive analyzer, or submit your own file for analysis.