Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ce9f220337849a…

MALICIOUS

PDF

71.0 KB Created: 2021-10-03 11:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7aec18b2ebfe3dfb9935de60f01039a0 SHA-1: 69bee75de9eb88b9a54a20981cf59eea146a89eb SHA-256: 08ce9f220337849a4b9627f1ecece666ae993c348879789a1deec87ac8a7bdaf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution campaign. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, suggesting an attempt to obscure the ultimate destination. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dakeworurizirunomilazaj.pdf In PDF document text
    • https://myparrotfood.com/user_files/files/82313692881.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/47401180222.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/gupijawaze.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/31573629396.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5bbe38f82---gojurukofitilof.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/95100755352.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/19657796692.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/pofelokisizawerosuziku.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/3272311116.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/98574852532.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/98756930970.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/39532924085.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/bojozoxup.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/botisadevemapuf.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/r434o8kealku9353u5blpqvqkt/12259349559.pdfIn PDF document text
    • http://plncse.hu/php_data/file/niwed.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/38366575337.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/ronifunamexuxuvo.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/gijijibowugiriselebimi.pdfIn PDF document text
    • http://mcutech.net/files/mivob.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/8897285493.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/64501702742.pdfIn PDF document text
    • http://www.heksan.com.pl/file/47954939766.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109141605264981.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/mugakigaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=anxiety+taking+over+my+lifePDF 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_off0000b541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB541 10744 bytes
SHA-256: 812d02c7f81e47f1421b229f8d20597fd431ec448239ce67d398754e4fbf83fe
font_01_sfnt_off0000ce07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE07 15932 bytes
SHA-256: 01d49c88b14abd4983d142a1a420a7fee5809f36558a860fa961df9d4dd9d28c
font_02_sfnt_off0000f656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1