Malicious PDF — malware analysis report

Static analysis result for SHA-256 92abe13b9168e365…

MALICIOUS

PDF

72.4 KB Created: 2021-09-30 18:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4c62aa74691fb8d2997f80683d11efb6 SHA-1: b2604fe98026767035c91860b8484f03c153a1d5 SHA-256: 92abe13b9168e365ec7321423f4b1f0451b16ceda48718750053615b88ef6f93
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://freeware-software-download.de/uploads/editor/file/reluxilenu.pdf In PDF document text
    • https://losaltos.com/wysiwygfiles/file/44766637569.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/54789665430.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/32232143512.pdfIn PDF document text
    • http://vhktn.at/images/content/files/tagikuloj.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109061329573279.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/59567813861.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/84100179675.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614fb494498fa---rubuzenupulunimezowexokar.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/norijekijevujumox.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109051153430483.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/66717105887.pdfIn PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/44270752808.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3d2be7a3f8775e921e68c59161b89887/54937316216.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/sobokojadojisixupop.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/22452867779.pdfIn PDF document text
    • https://skl68n15g-n2ox.com/contents/files/sanusumamajoxabanokigixa.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/lexip.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/73430631439.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/vedebobo.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/zevukugozozimusora.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/57218278272.pdfIn PDF document text
    • http://jjc-dev.com/userfiles/file/40855602271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gta+san+andreas+for+android+obbPDF 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_off0000b58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9C 18040 bytes
SHA-256: a5465560c1888d372b3657cf6fd4dbc36f3f8deb7c32da977497cbb351bb434b
font_02_sfnt_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 10480 bytes
SHA-256: a4b4dbd61e22f2fa72571989988e799c7eaf2358468241c2b83f551b4df9702c

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