Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef8dc3fba9d15e2…

MALICIOUS

PDF

86.8 KB Created: 2021-09-09 15:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: d22e0fbacdf8d41f88d2d178dd343bac SHA-1: 4d392a602feb122353c9ccc6721e4f991ffe4405 SHA-256: eef8dc3fba9d15e29dac867d1cbe2533e9e1f48c76e3c4027fb82ca8f03d6c5e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/db81938686c2b72691303641f0228e44/titizufugaperanuta.pdf In PDF document text
    • http://metabolit-plus.ru/files/file/vobewaxosiriralenez.pdfIn PDF document text
    • http://ilkemymm.com/image/files/66736435956.pdfIn PDF document text
    • http://exosushi.com/uploads/files/wogivasawoxawaxedol.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/lawejijisipopobokomu.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/vabavadizelajapigiwizuti.pdfIn PDF document text
    • http://swhos.com/upload/files/pefav.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210907211121.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/xoporefedoravemisojaj.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/7606554291.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/wofidimob.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/44168852662.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319bf52e3c8---xosalaroviwifi.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/repelalokiruxutikatanij.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/94732916872.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/xanibomatududu.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/zirutekosedapunagufedew.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/43304807424.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210907165604.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/kopoxolivotodatirun.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/83247229091.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210907164838.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/pokokelivigose.pdfIn PDF document text
    • http://ladna.pl/user_images/file/77041553073.pdfIn PDF document text
    • http://nature-revive.org/files/file/4230192567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=download+gta+3+for+android+full+apk+freePDF 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_off0000ede3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE3 17696 bytes
SHA-256: e3a6c5e0d704d10d0d7a0d2f013a6c8c456da2eaf25daa7e240e11e0a6fc1aeb
font_01_sfnt_off00011b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6E 10956 bytes
SHA-256: 026a3a4519ed481441cd28f9bc6819987da6eec6463c66095ed0bc7dcec7936a
font_02_sfnt_off000134d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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