Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f179da7c656048…

MALICIOUS

PDF

70.2 KB Created: 2021-09-19 21:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2e0acd2a75c31c16e910dafd49ace79c SHA-1: 069b00eb8b40bd966ee25063c3c7c77585b0d49c SHA-256: f9f179da7c65604865f94d255f94cd10538f0c65de1e45772577fa2b127cc17f
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 high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely to redirect users to malicious sites. While no scripts were extracted, the presence of many external URLs points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://stacjaregeneracja.pl/userfiles/file/90991865882.pdf In PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161450aabf2ce8---53477127500.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/86392440183.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/92366619965.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/bowaxijusosogamelel.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mitixapemonububopepix.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631304139.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/50401767385.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/denubawonexuxo.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/73306927219.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/31549432977.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210906214810.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/39249757824.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/42881616613.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/petomos.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/leradaxetofiruzurodimozur.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/79489485220.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/lobevarunelufisewufiputo.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/77287120572.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109040651551766.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/zitew.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/gizejilexoxuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=alliyilam+poovo+mp3+song+best+quality+downloadPDF 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_off0000b120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB120 11440 bytes
SHA-256: 32e3114b9923a3eaec6e595ea2550242f6371454dee31ab4c22b07b2d05798ba
font_01_sfnt_off0000cb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39B 15520 bytes
SHA-256: 15a4fdc634d128686920909a50087c8a23b5f68f7db161a7a033375837b17f8b

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