Malicious PDF — malware analysis report

Static analysis result for SHA-256 362eab99ddbe0011…

MALICIOUS

PDF

67.8 KB Created: 2021-09-25 16:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d059966f989deefb3ce76fb1724b31d3 SHA-1: fd13a84ff6d7a8b6b3e9e18ac4e262b536392b5b SHA-256: 362eab99ddbe0011388bf0595ab1ebb3fa3a07e09e1ccbea88e0eb5e2a8c46ce
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs an image-only lure, a common phishing tactic, to entice users into clicking a link. Heuristics indicate it functions as a link farm on disposable hosting, directing users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to phishing or malware distribution sites, aligning with spearphishing attachment techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://monikaknoblochova.com/userfiles/file/62572563214.pdf In PDF document text
    • http://zrdb-drogbud.pl/Upload/file/vapegatimawobewula.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/95572311307.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/vitukosuluwemiripulisobap.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/98964028129.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614100819db96---kijaxozagononozugisejaluk.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/resanoxasixenegowidavot.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/66025165433.pdfIn PDF document text
    • http://ukrkarta.ua/fckeditor/userfiles/file/ganivaxobosutejivanipev.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/sikasagokorufisinulemu.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/37817088320.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/ramose.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/parojajewiluwuf.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/siteniritinisiderobuvev.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/tozisaguropoganabezige.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/10359700810.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/kadafopovejusogudamube.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/nobupexevakewedepafepe.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/regawevirawop.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/61219521394.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/xasesozejufadew.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11085753404.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/5fbe24ea0a46087bbdb73ae6d794524a/13369227890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=after+we+fell+full+movie+free+watchPDF 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_off0000ad94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD94 14404 bytes
SHA-256: c1eb1f9ddd79be0b9fd2af1f9602992e25b2fbd0930f65b8dcccdedb5363d1b2
font_01_sfnt_off0000d15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15F 10560 bytes
SHA-256: c5fc3d1d5394ee2b55415c243722e6e9141e791a70352d3cc70e3b6066849d17
font_02_sfnt_off0000e988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1