Malicious PDF — malware analysis report

Static analysis result for SHA-256 269d8478a454c73e…

MALICIOUS

PDF

80.6 KB Created: 2021-09-20 04:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d2d7744b09d218c98a80c7464dcd4544 SHA-1: 34a0dcd93f6106d9d5ceda87be282f1f847612cf SHA-256: 269d8478a454c73e3e9bcf1751de70d9946701cade990e2f92a41567c81a2cbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. Heuristics indicate it's a link farm on disposable hosting and points to compromised CMS uploads, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://sabagdasarov.ru/upload/file/fedupibojetik.pdf In PDF document text
    • http://jfhcoaching.com/userfiles/files/44098060923.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9dacd0ac3---napikugatonozajorogewed.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/90111690669.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/10egav2ctth56i1ecq2ui3tiqj/lubasire.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/kimiv.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/xabedemonimunoxinuloro.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/22837714657.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/sovazu.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/30149799707.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136756064d24---jedafe.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/11397126251.pdfIn PDF document text
    • https://mcsfood.com/images/file/pikanumubonaz.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/notuzoxadejobufepolezebu.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/xelipagoka.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/57326291628.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/15722466594.pdfIn PDF document text
    • http://artediapharma.com/upload/files/75195319795.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/fudilagi.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/seviwotovezakulezug.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/benibipup.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337a6ddf293---xadiluvasuluvo.pdfIn PDF document text
    • http://health-bridge.in/upload/file/76532332823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=fingerprint+lock+screen+prank+downloadPDF 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_off0000cc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 10844 bytes
SHA-256: b0401414d3c883454b4749bc4d231228141a49de4fa2151118515615009e4a41
font_02_sfnt_off0000fd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD80 21560 bytes
SHA-256: 257571030d1ed691945a4f34dbb3c029e07dfbd21bb8077f751744b02506417d