Malicious PDF — malware analysis report

Static analysis result for SHA-256 299615e3a019b579…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 02:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6c68b19e9b4c2da8cea65d09633db05f SHA-1: 58e768dca5f0dd7d89ea500601a18c1a02bed4d8 SHA-256: 299615e3a019b57997b909f42290d3929e9cc84078de6648efd8b5f73b91a454
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://catamma.ru/uplcv?utm_term=3d+apartment+layout PDF link annotation
    • https://vico-domrep.com/ckfinder/userfiles/files/mopaba.pdfIn PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/84232167568.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/29300031522.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/wonogetob.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/zutepa.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/17012972038.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/94727506865.pdfIn PDF document text
    • https://mcsfood.com/images/file/43307509039.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1631375195.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/95274119428.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/87208360614.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-12/20210912223300799064.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/57451379786.pdfIn PDF document text
    • http://fygl.net/uploads/file/122020538185.pdfIn PDF document text
    • https://computerzone.pk/file/66102877088.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/duligononamosotenadek.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/zokitigejutanod.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/47762531510.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16144fe9028792---88645678544.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/babako.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/9891383133.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/fopiduraxigix.pdfIn PDF document text
    • https://zahidnawaz.com/UploadedImages/image/40532382718.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/q4thq73qbie22pibustgneu017/mulegupedep.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_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E5 17108 bytes
SHA-256: 9459da6de2284cf04cfb418e54dca330aa0dd56df42428413f22feeedb679bfd
font_02_sfnt_off00012429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12429 10580 bytes
SHA-256: d26362df91c67bbb912fc99b0390f8f170dcec531c9bf05b7b02965a2bc78f75

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