Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bd7d517f070bf6…

MALICIOUS

PDF

67.9 KB Created: 2021-09-07 10:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2671992516510291d3202542c2a2b098 SHA-1: f5b1b6b1b932affbaff8b0b3aa23be023e0c4b2b SHA-256: 07bd7d517f070bf690830231cc5ebe005d70f0491be618c1d071144718cb0012
154 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits vulnerabilities or serves as a phishing lure. The heuristics reveal it functions as a link farm, pointing to numerous compromised websites that host further malicious PDFs. This suggests an attempt to distribute malware or conduct phishing operations through a chain of compromised resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9158

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
  • 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
  • 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://ceroki.com/image/files/60409298896.pdf In PDF document text
    • http://lottfamilyreunion.com/clients/878857/File/28052022824.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/54b2ad873bf7a94b4dcf277b244cc13a/2177276346.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/bfg1l97k4f5ps672mtbkd3b8b5/43962728846.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/63096966273.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/fb0b86d15b8c0016d583a00539fdbd1c/6807743542.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/fapipijewakegijovuvelilur.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/wijusige.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c13a6964f93---vufabezutuneberawi.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ac172349a---28653750106.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/wufevovatumibovuxat.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9127c0ee9---lateragubinofibanozu.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d608d0ebd---10487983731.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/wevagusewuzitura.pdfIn PDF document text
    • https://anakaygame.com/calisma2/files/uploads/jajigebezovopure.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d617966ec9---34366337862.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d35d6ee9ef---30153519473.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2d9002fdd---57021334577.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af27498cd4---gigikitow.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/bewerajuri.pdfIn PDF document text
    • https://kham.vn/userfiles/file/60841913047.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/3b1e2005a2acd144a1d5a947bdf2d8d4/58816114371.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/86365605055.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=2018+calendar+with+holidays+printable+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 11460 bytes
SHA-256: c39deabd333d89acaf755f7cf3c585644f36933c39f2f68a68a833a96da7b94c

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