Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e0f60670126f7e…

MALICIOUS

PDF

82.3 KB Created: 2021-09-21 03:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a6d79eb67b597baecb392870572e959e SHA-1: 74b90045a9ab34b5fdb93d641059ea62701bdad0 SHA-256: 78e0f60670126f7ec300cc88940a8ae9bb7b4e30815d7f7e76505223be1799f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm strategy designed to obscure the true destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nomylo.ru/uplcv?utm_term=fast+%26+furious+9+torrent PDF link annotation
    • http://koreaseals.com/ckfinder/userfiles/files/poridusus.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/futadodige.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/ludoliburikov.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/23124724333.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/95482328085.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/28031906756.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/48389592923.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/toxifimogujoxubisifaso.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/giwudut.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/xibagukibobekotilud.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/33785312514.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/65883523450.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/gojotozadogogidexe.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/waxagenumivijepuwaron.pdfIn PDF document text
    • http://bazab.ru/ckfinder/userfiles/files/52743848863.pdfIn PDF document text
    • http://chinahongji.com/d/files/bizidux.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/kelevufigepujixilabog.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/muporamorovelonifobakatuw.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/fijujavokirutitoz.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/kegesuzopagoju.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/58186677071.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/77547544858.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161450050cd5d2---58195963560.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_off0000db6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6F 9476 bytes
SHA-256: f51d5d1ed6f87b52d1b9f429dd51402bf3eddb0f0727a485d5a13d2cfa109c79
font_01_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 19996 bytes
SHA-256: bf794c29bbf6eed2a3a68fd3bc9a65e86602783fc0450c49dd9e2a34cbe854b4
font_02_sfnt_off00012434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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