Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26bfdcf04f642ed…

MALICIOUS

PDF

75.2 KB Created: 2021-09-12 06:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6707a40d6f7649beaa222c455dac5e98 SHA-1: b306d68d1436b40217232341743349f27fe56ff2 SHA-256: f26bfdcf04f642ed1875f13c125711e98ec1c6655836758f191e8f3430de1d78
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high number of embedded URLs pointing to various domains, many of which are likely disposable or used for link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://smidgel.ru/uplcv?utm_term=app+store+ome+tv PDF link annotation
    • https://labelmarket.eu/data/file/tovamafidaxejupafelapora.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/nimosubusajumabuvifijof.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/wamoxovuzofuvaz.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/34802447349.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/fomixikuvelepuge.pdfIn PDF document text
    • http://smirna.pl/files/file/10907312750.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/dewarojipujejofijotalu.pdfIn PDF document text
    • http://ccadl.com/files/20210901063215.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/geweposelo.pdfIn PDF document text
    • https://educhina.mn/editor/files/90516601464.pdfIn PDF document text
    • http://esejsc.com/upload/files/95707982456.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/42965891840.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/89994692358.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/zupozonafafef.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/zifuzodexatinorubi.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/8789155102.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/vabazorunerubudugig.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/pugizepofapolivariloxod.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/22596654767.pdfIn PDF document text
    • http://apvn.info/userfiles/file/pukiro.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161315b2fa40f1---63045571451.pdfIn PDF document text
    • http://www.truca-taoules.com/ckfinder/userfiles/files/17770442950.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/mojivedugimemibesamaruto.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_off0000c29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29A 10056 bytes
SHA-256: 253566c5bb4eb7cbdfb150bca5625e53f4f57bc2d560a9eebf37e638272f798c
font_01_sfnt_off0000d90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90E 17696 bytes
SHA-256: 07b5e0b8eeaa1d5dc5dc023a304f44aadd2f7f7bbe51756a3f373fa08bcca5c0
font_02_sfnt_off00010607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10607 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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