Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bf34323f8b3f92…

MALICIOUS

PDF

69.5 KB Created: 2021-10-01 08:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: da0c63fe691b23b376afb8bf2f5adbc5 SHA-1: e09e554518ddf61b7bc3331ec009e419e7421e24 SHA-256: 00bf34323f8b3f92a983a9d6677c23ea7621b6a52aedec0113f408a5d94962d5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-only design with a clickable action, directing users to external URLs hosted on compromised or disposable domains. The presence of numerous links, many pointing to PDF files on various hosts, suggests a link farm designed to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=best+windows+10+animated+wallpaper PDF link annotation
    • https://thaiwoodengames.com/files/upload/files/defezagirusejedijufuk.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/71206521954.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/5708125766.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/tegaruka.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612faa00493c2---38065487977.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/17194893606.pdfIn PDF document text
    • http://cpils.com/userfiles/file/jojirafuto.pdfIn PDF document text
    • https://trakyasoftavukatwebsitesi.demowebsiteleri.com/upload/files/potowibelafekakow.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/12753276092.pdfIn PDF document text
    • http://cdjuchuan.com/upload/files/48731231204.pdfIn PDF document text
    • http://deltools.com/userfiles/file/jebarufo.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/685c1e4241bb1ee6f8f72560485850f5/28387340899.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/6auumbfb0v0vbi9ti0saqjp7i3/neresimegakenaduw.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/vitovonuzakoza.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/kosepekerifiwikozeko.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16149db387990e---22089785419.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/99437113389.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1632042856.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/95965762194.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/32716558503.pdfIn PDF document text
    • https://fond.ru/userfiles/file/53406018421.pdfIn PDF document text
    • http://intertermo.nl/userfiles/file/jopixitozazedagadowetag.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/bofovikiruva.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/35885817520.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_off0000b29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAD 14420 bytes
SHA-256: 47ceb5b3e5dc78038e66ebcd77c794a1a5efa8cf28b8a3925339721833812eba
font_02_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 10868 bytes
SHA-256: 41c7ce6dad6e82dba3800e546d9fd6664df49d090fe827500889f6b832625268

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