Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97e864ca399f253…

MALICIOUS

PDF

88.3 KB Created: 2021-08-14 17:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 64ca972a4068ad4f6f42afcc3d9a4519 SHA-1: 9e6ce9b93daf82d51e9ba460f365b8e3cd4c7d83 SHA-256: f97e864ca399f25377b541c0f9a777db0f5e179b76c86bac9b646a9bb8a2e873
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/4tb6ghinifbpc3q7di3vqc367d/gadonojofajaxirene.pdf In PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/6fce606c5ed3e1707f034fe6f3af8c5b/zozapafabokel.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd929a66de---91564725776.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/m0t9rbht97r0beeadusuvm5d4j/41101389602.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/tetumekinuwag.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/17ufkq5heaf7g8o42l5aaa9tlu/72943339803.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/56137354680.pdfIn PDF document text
    • https://rosycaffe.com/file/bipib.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/47am4dingc46mlulcvhkmi2op8/61321246420.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/doxox.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/79395467104.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7f9b5b8bb---88435544333.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/rokenumosafanen.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc089744eb---90819342652.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6bd8bd76e1---wesum.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/88364664396.pdfIn PDF document text
    • https://panama4d.com/contents//files/2875483147.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/jomisawomewi.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9be9bb5ce7---lisokubude.pdfIn PDF document text
    • http://azizolace.cz/images/file/xikagerafaxatin.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/u1j6np1fngrhqner24uoa8sp37/lijukijanaveduzuladovab.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/71265863560.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c38d404d2a---nemafapufifibofexigodukiz.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/jamiburew.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba241203a9---tujutunerozarofuja.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/5806822b77d1409332d6a535712db561/63047882566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+clean+whirlpool+quiet+partner+iii+dishwasherPDF 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_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 10932 bytes
SHA-256: 00cc6de43b4ee9285aa1cabb1e8e26ab33d60d77542efd316b4659fcee961047
font_01_sfnt_off00010991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10991 18608 bytes
SHA-256: 910f4ff75a003e98535d5e2d400f72aedbb1f5e87392843cd2ca30bfef1997c8
font_02_sfnt_off00013a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1