Malicious PDF — malware analysis report

Static analysis result for SHA-256 abad507158547add…

MALICIOUS

PDF

90.2 KB Created: 2021-06-27 20:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fad0089ab1275deac883dec88b472299 SHA-1: 56331f9dd99a79bae910b86fe0d2034c86e91019 SHA-256: abad507158547addaef34eb5eb9aa7d243fb0ce388ccaee601fe239f11fc133b
176 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other domains, suggesting it's designed to host and distribute malicious files. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable macros or editing, a common tactic for malware droppers to bypass security measures and download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082352ab80b0---96628988912.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b9e10e76e---zefazalowi.pdf
    • https://fallsplat.se/file/siwosaveb.pdf
    • http://chayka-svg.ru/files/59795153773.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608566a71354a---viruvuxarodasaz.pdf
    • http://travelport.pl/userfiles//file/54876866983.pdf
    • https://carlojans.com/cms/file/15701953003.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc8d4236a7---zebolumi.pdf
    • http://zrdb-drogbud.pl/Upload/file/xipelafake.pdf
    • http://www.ecvbrass.ch/user/web/file/40405874963.pdf
    • https://aspaeng.com/files/image/files/14703147528.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/83d417f6db01d9c5a4245f7c6c2e66b5/64117393240.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b91d37cc16---78105467795.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a6009b7d2---29649261249.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad94fe36b9---movamufopoxanejojex.pdf
    • http://luingpyrex.cz/foto/Image/file/notojinedotidegawuf.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/95895502924.pdf
    • http://analogsys.com/uploaded/file/761886625608bcdc294ee6.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03f12eb156---51073048024.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86af86041c---90268471346.pdf
    • https://sambelteri.com/contents//files/52626900906.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7b531ea6b---54329435511.pdf
    • https://mmszke.hu/files/file/wesepipeviguzasube.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ms+office+practical+questions+and+answers+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d6.bin
99fed844902eab60fc03172b4abacbaa2ed56be3502807ce8b4df7b16a1c9e72
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D6 10936 bytes
font_01_sfnt_off0001132b.bin
3fa5e121c1fa6a6712c045c0614e3bb39ecca7b51fcedcfb4b0d31aa5fca6bda
pdf-font-stream PDF embedded font (sfnt) at offset 0x1132B 17612 bytes
font_02_sfnt_off0001415b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1415B 16792 bytes