Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe366349d73e2f45…

MALICIOUS

PDF

81.9 KB Created: 2021-09-17 14:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 84d84a2baa8b14cd6173f4d8cadc2375 SHA-1: 29669cb931a65f5a59f023377b819fa4e1f5d048 SHA-256: fe366349d73e2f455dc344f797d790ce7eb364eefb00c04b048b19a74200d488
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and potentially a trojan delivery mechanism. The presence of numerous embedded URLs, including one pointing to a suspicious download path, and a heuristic indicating a 'download button' lure, strongly suggests an attempt to trick the user into downloading further malware. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate these malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=car+stream+apk+without+root PDF link annotation
    • http://ztkammer.at/uploads/file/subomixekulu.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/23420807568.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/76843024893.pdfIn PDF document text
    • http://www.moyekolodin.com/files/78325278707.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/9a224c571b3fcb96f961e9a1b75f38a5/tonibuzekigatemuk.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/pibumatulusubibusiwi.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/maxovizoxokami.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/nobugivagukuravugexipule.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/lirazidejurusalijezi.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/zutifovure.pdfIn PDF document text
    • http://ucokampen.com/media/files/78881382097.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/4529002952.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16137f190ae5a4---linukolofujefi.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/80407721339.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/601194651.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/32764357151.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/nexajunisolituralugetogu.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/88569299714.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/zovewenorega.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/xodalugid.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/niluruvaperu.pdfIn PDF document text
    • https://siltri.com/fck_upload/file/13640298348.pdfIn PDF document text
    • 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_off0000dcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 10676 bytes
SHA-256: b69e17fb370391d1954fe2e37ccbb735536ab8f2d41d9cf12fd56dc5b0ef45fe
font_01_sfnt_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7D 17416 bytes
SHA-256: e63b89f731a66023480e17d6924d3ab97d2cb96117271035a13c1b83fe23b8a6