Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0bd568e446b2cb1…

MALICIOUS

PDF

125.9 KB Created: 2021-07-03 08:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 805b84b1810b883d9b1b48ebe0a4dff5 SHA-1: 6ef51375d01b89bef691c69cbe1f85a366254057 SHA-256: b0bd568e446b2cb19b0abd145299c7338c9e6d910245bafe42af17c2996adc09
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating it's designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these external links. The 'Urgency / deadline lure' heuristic further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160986d669670e---63012353209.pdf In PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091bbdb4aaf0---xiwamojevezinitatobik.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090116edcfb8---nugesagaseniwefipatovinen.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873263afe49---49952194683.pdfIn PDF document text
    • http://podushka.by/files/files/sitovopifab.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ee70efed9---munavogotifer.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfb8fbaa25---dasobilelut.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/rk3bsaubvqqa864ttk9sq8oih6/77468550086.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/80671271956.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/0618e211cfed37ee30d7942f1d6e5530/kitenosedotezubamexata.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/8c66e1c833847ff7ab5a30f0d433e8a4/poluniguwukeviram.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082363e5610d---zifugoku.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160996e6d00517---dapisazeto.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/nodaboze.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/zosijejomotubunib.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/kt1h4mq64n01mc4jsnk4ndhtiv/zafitafob.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab72afed15d---tenotajuvigob.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/67493674820.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/b11d6899d045716a2f6fb5789fab641a/32876170265.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210525222335.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/16966785352.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1621241173.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7ede7c7d1ad8cec6dd70dc5737fe31ab/fujunurulefi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=court+of+ages+law+of+the+land+handbookPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17455 10988 bytes
SHA-256: b63a36a7121f8f636b7b8bd70242ef20ca78bdf401524bf5aee14b4199f091a5
font_01_sfnt_off00018dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DBB 16228 bytes
SHA-256: 0dc3f424d0c2fd3f0dc60d7d33ad0dce698cb25de44bf62e32a6805a65265330
font_02_sfnt_off0001a3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3A2 17028 bytes
SHA-256: 99e419245e28c0890ff2ec445dd9dd99803af22ddb9cc7afe441296e1cea1acd
font_03_sfnt_off0001cfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1