Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0db24b0e0f12d4…

MALICIOUS

PDF

80.1 KB Created: 2021-09-12 05:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 884572a303e2ebabd0a36b38438e0b93 SHA-1: 387fb0b54400321c7909ee1c0c7c904f2bcd3474 SHA-256: 6e0db24b0e0f12d4c17215824eaa186d9d50976594b065ce9b60fd64e7dc619a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links, many of which are hosted on disposable domains and appear to be part of a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The presence of a download button lure and the ML classifier flagging the PDF as malicious strongly suggest a phishing or malware distribution attempt. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://damsindia.org/admin/uploads/file/96968384589.pdf In PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/71623682229.pdfIn PDF document text
    • https://fond.ru/userfiles/file/xosazoz.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/15604838439.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161395e3743c70---kusigixarukuxevu.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/wuzevawefa.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/majigeluwenadekiferan.pdfIn PDF document text
    • http://abpaluso.com/upload/file/89661298200.pdfIn PDF document text
    • https://jetaime-shop.com/files/22462860744.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///ruwakobilukuxutofu.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/65307689831.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/85886068782.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/52784233881.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202195956223952.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/61777302337.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/sagatipiterobabuv.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/tefogokifubi.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/926137044.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210909032905844.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/dobigazaxu.pdfIn PDF document text
    • http://gavionescodeinsa.com/userfiles/22046578381.pdfIn PDF document text
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/52019437788.pdfIn PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/73465893461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=aejuice+full+crackPDF 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_off0000d34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5D 18804 bytes
SHA-256: 3bb921478ff14a15f1d40c94e433ee3e3825b800143bb80eb041c31e5f749e22
font_02_sfnt_off00011c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C58 10140 bytes
SHA-256: a2b5247590a80eaf2921e348073c94c7c85def8a1fab75b30526db7e8063ad9a

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