Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2ed6f6fce31382…

MALICIOUS

PDF

84.0 KB Created: 2021-09-19 09:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5d985013730d0a45ba8afb168bff7899 SHA-1: 486b16caf47d0fbfacac51a48d073190c53d7b56 SHA-256: ce2ed6f6fce3138257986d6733f009a7f0ef81b989ec091018c969858ad95833
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 pointing to a link farm hosted on disposable domains, suggesting a tactic to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://thingsantiquesla.com/userfiles/files/98405981639.pdf In PDF document text
    • http://oroblupiscine.it/userfiles/files/pawozorofufa.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/nubukajipivebodigekalego.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-16/images/files/47500131807.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/91986858982.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/rinonofunavimeg.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/xajunikasupafaxo.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109012327228344.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132d2e01b0f7---86169505992.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///siluloletoleju.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/53239145995.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/lofejejuv.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/jidowofikodoso.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/96637623736.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/45225821321.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/zulozegub.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/mogemufesuw.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/93796448436.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161466896b09b0---78930257806.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/71080269924.pdfIn PDF document text
    • http://klenderbio.com/upload/files/31963019277.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/80624228938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+the+command+to+summon+the+wither+stormPDF 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_off0000e452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE452 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 17124 bytes
SHA-256: 5727fe1343686f2babe8dc4e566f4c9615d70380c7b652cb82948366910d7383
font_02_sfnt_off00012990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12990 10768 bytes
SHA-256: c10c0da4664f3763567350cf47d55c4aa115ba38eb00b017d1b9c3c5a2526c1e

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