Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bd2252260ed51b…

MALICIOUS

PDF

92.9 KB Created: 2021-08-16 21:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 4a65a5c3f24a786eae0b0c327754f3dd SHA-1: c001ef8df92a3ecec0df3fda825a58555457b4c2 SHA-256: d2bd2252260ed51bc98da6a8b61801ba4aa430fb334b190efc583dc81334cbaf
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are sufficient to infer a malicious link-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/papizegadekovujajuvula.pdf In PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/88506820115.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/vezababemelatajilolanoxi.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/682rv2gjr764g27ck0rjvf4hm6/pusosoredexaloxekabogipid.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/kazipu.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af60f35410---71215805470.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/zoretojizadanuwoki.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c7702df0---11817947293.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430021958516131.pdfIn PDF document text
    • https://carlojans.com/cms/file/nulurinokam.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6e9ee65917f60215405b6fe85193f6ff/fekopififudosuwop.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b91fee22126---22282053009.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/kujibamiwu.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b844cede7b3---94133975744.pdfIn PDF document text
    • http://haphadoor.com/upload/files/laseb.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085bd8a1243d---depil.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608978046a154---72479428081.pdfIn PDF document text
    • https://chemasan.lu/userfiles/files/nufan.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608448489a1ef---lanomapadanufododupozifuw.pdfIn PDF document text
    • https://advik.net/userfiles/file/20003224325.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2vmf9cgah5g502ren4fh15kaj/9494429151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=ejercicios+predicado+nominal+y+verbal+onlinePDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/89755802361.pdfIn PDF document text
    • 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_off00010306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10306 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1D 11008 bytes
SHA-256: 67c3d1b2d8f7fdc3b113cae16113f1aac8471f5be038c9e8e6fa6bf63ff2986d
font_02_sfnt_off00013463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13463 18208 bytes
SHA-256: bea143f134e63686d8ef301b92562f5f7b54668c1460f734363a1deb37f0995f

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