Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e4e96501780b0e…

MALICIOUS

PDF

70.7 KB Created: 2021-09-26 19:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ef191caa04ecd788934dd6cec1978180 SHA-1: f328d785e39c7001762aa08c71d76f685232bf43 SHA-256: 07e4e96501780b0ec630c93544e30db8489d34bd1d66f63f2796a7f09644db85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a ML classifier and ClamAV, indicating malicious intent. The document contains numerous embedded URLs pointing to disposable hosting, characteristic of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL distribution suggest it is used to facilitate phishing or malware delivery.

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 https://catamma.ru/uplcv?utm_term=stunt+games+online PDF link annotation
    • https://wasael.com/userfiles/file/66810329408.pdfIn PDF document text
    • http://marymo.ru/uploads/files/zevozatonivufimafi.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/98015783187.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/jedapepitakibunesunasik.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/vokujubozuzeta.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/54835294246.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/57613640475.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/59696445385.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/3ee1d8987839e6dc582b0715397f05e3/minoxirox.pdfIn PDF document text
    • http://xn--bqrr0jw6bmw2g.com/userfiles/file/1632196811.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/1582756858e0f1bb507de829324a6d87/67771277820.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/jilinudezeteboj.pdfIn PDF document text
    • http://centromp.it/userfiles/files/47646132222.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/xijerulobezepipakirimidol.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/geniletexadiratono.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/jasewigovefi.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210911155000.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/lowenagisoxopatikidewotam.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/67693160291.pdfIn PDF document text
    • http://teknis.it/userfiles/files/48881955728.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/vevuzofavoselidij.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/lufonu.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_off0000b0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BE 17632 bytes
SHA-256: 631d7f4addbe916ee064ee676bc63fc4e2828520502887018ac1a62fb7eddca9
font_01_sfnt_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 10528 bytes
SHA-256: 5f5bc708d797a087cd8e9ca44f491d6b51a0ff952661c6e8ae162491793c79f7
font_02_sfnt_off0000f5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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