Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c01fa023296404…

MALICIOUS

PDF

84.0 KB Created: 2021-09-09 19:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4a300ae7272a43503c043aa4fa792255 SHA-1: b67be88c24fd0c00515ad98cd1f739b14ef14564 SHA-256: 65c01fa023296404913e4a0a1d5a647205cd08dd1c838d84246568ada223aa34
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to disposable domains, which is characteristic of a link farm designed to obscure the final malicious destination. The presence of these URLs suggests an attempt to direct users to potentially harmful content or downloads.

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://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317e7823c24---potenirojujulururagubaz.pdf In PDF document text
    • http://fine-cottage.ru/userfiles/files/gonewid.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/munivobotipevadiwojakizev.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/69732127416.pdfIn PDF document text
    • http://guchen.ru/d/files/23301795642.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/matijitawafoxul.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/lukurananenasevanefo.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/71066252151.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/69844986746.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/jetodujiganutosoje.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/43966379715.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/geniletexadiratono.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/5239378532.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210909062103.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/4875368735.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/sadela.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/jugubavovo.pdfIn PDF document text
    • https://maturana.cl/upload/file/sewefovusado.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f650c2e51---lopiboxok.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/5328743451.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/89415543226.pdfIn PDF document text
    • http://csp.hu/editor_up/12841642423.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/mixubomu.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/nigixejabusalofi.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/temoxunedipesazumovibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=must+build+things+in+minecraftPDF 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_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 11036 bytes
SHA-256: 00d7dfcc468b41d6b5be89e59d5e2f8f63b5a58db4b8db057d079c04ea7da865
font_01_sfnt_off0000fdb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB7 17164 bytes
SHA-256: d097bcf2e42bb3aec658e577e7d17a2f09e02f557c8944c1e04384b385b14ac9
font_02_sfnt_off00012a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1