Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf071609cf220a7…

MALICIOUS

PDF

97.5 KB Created: 2021-07-16 15:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5297b5b4a97e856ec965e437b897baa2 SHA-1: 57d15383185b8ac18be164f34b2832796aa3e151 SHA-256: acf071609cf220a70c5e06c1d233b54c458ae7c8988ea611b432a456a31b0a40
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised WordPress upload directories. These links likely serve as redirects to phishing sites or malware downloaders, aligning with the 'Spearphishing Attachment' and 'Exploitation for Client Execution' MITRE ATT&CK techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c5c4176cdd5de95a474c23f41841db56/manisuzadonutuposo.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/kva04uuinelhcio73vuckua8fi/farezisovowafegajutunise.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/rhl5khq36bkk382u6kv7lais24/73999798323.pdf
    • https://ancoraeducacion.com/images/zugitefanilexizejo.pdf
    • https://fo-prefectures.com/pages/files/vudoxowivemujogumosomebal.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/18bc013165b65cd63d0a15a845439454/pejizofa.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/4b85acaeff118bb88d279851227b93c1/4825125305.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16095c83628d53---646033418.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfd020d523---titedekojipowe.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/67629fb6cb4be07390bc7492eb0273e2/21417288807.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3dda3956c---robirigaruz.pdf
    • http://langmypham.com/luutru/files/80126061874.pdf
    • http://busankid.com/webfiles/board/file///56959197566.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca3df08cab---80638565354.pdf
    • https://www.mds-horizons.com/upload/files/9214332484.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/9e6f2a7823fc2eb71fea81c3aac66820/pezozuzudulewizetewon.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085747cd2866---95517468060.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/716ff54fa1be956a430ea6cbc6815ff8/35407755794.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/qq99atesuibm70onv3qtqqokvn/povezalusuke.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/8728ae237a7baa589cc9caebf99f7305/sugividazovonojini.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd474f99bca---rigurerota.pdf
    • http://ithaca1962.com/clients/41687/File/63868365679.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999477bb426---tazoxemusidijotetad.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/86b0f139d873b3487cb1373af1270cb8/nusawebaxasu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=heartbeat+under+the+floorboards
    • 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_off000117ee.bin
7dce90acb9d534fa8bca39d4b4a5e2e10e9246f75ea4ba8aa0dd6e9dc1d61255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117EE 17788 bytes
font_01_sfnt_off000146c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146C2 16792 bytes
font_02_sfnt_off00015ed9.bin
80f398987d82a0c5b040b650c97203060fb0ebbc9ee017b172bd535c889a0de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED9 10592 bytes

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