Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf0f3fcfabb2320…

MALICIOUS

PDF

90.0 KB Created: 2021-09-15 23:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0cf050f58a7310be1d1fa1d17779331c SHA-1: 4a1267c670cfb1260340fe5259f4926e1d45880b SHA-256: ccf0f3fcfabb232059ba56abc0f4446e1ec4b9181e030132a6eb0a074262e9b3
196 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update, a common social engineering tactic. Several URLs extracted from the document point to potentially compromised websites or link farms, suggesting a mechanism for delivering a secondary payload or redirecting the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/15866932070.pdf In PDF document text
    • http://efrex.cz/files/file/lajux.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/67564643395.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/6d21257d32bb24bb133cad2952220278/lomaxajudevufewofopibasu.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/valizobisilazidibedelebad.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/71306783209.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/20077061218.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/66165430694.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/tidavuzofoj.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/28908825545.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/3656298732.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/jadured.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/bemiwiganuleroropapav.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131b71eeb854---wogivukemuxijel.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/fuzomukenevowipomonejam.pdfIn PDF document text
    • https://nistd.in/userfiles/file/77320287581.pdfIn PDF document text
    • http://kag.fr/userfiles/file/nutukefirimiwevi.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eca83718d1---wugukedepuxovo.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/mosojefesuve.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/9144180064.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/lutilubuxagozewadox.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__61376718D1B6D.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=3d+animation+software+for+android+free+downloadPDF 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_off0000f9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 10676 bytes
SHA-256: 2b380ecfac6d8d5db8760953920c586eb6bffb1c3a91645045349afc7cc06e1d
font_01_sfnt_off00011263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11263 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A75 18444 bytes
SHA-256: 013705f27edd9a360c1e5472037c3bf9849175a1b7b4bbc4ea1cf96989afdbcd

Open this report in the interactive analyzer, or submit your own file for analysis.