Malicious PDF — malware analysis report

Static analysis result for SHA-256 342fc1eb56831460…

MALICIOUS

PDF

105.8 KB Created: 2021-06-28 19:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3324707e17a1db8b452ee41d3ce571f3 SHA-1: 2c0314ebcbcfc76bf38e34d0468fe205c07b8b33 SHA-256: 342fc1eb56831460d202a129c53ed45f802309b9477464e0d58ef6a4b4da4cf9
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the PDF as a link farm designed to leverage SEO for potentially malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/94b5177a3560b00747239654fc13e8c0/bepufakowubopag.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c18f702a361---20975094084.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973e7461bf4---xetukereboperasemozaxoso.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe5d98671672e685b2bf4ada877e94f3/kedoki.pdf
    • http://18554080.com/userfiles/file/wuriwutojome.pdf
    • http://sushinamu.com/uploads/files/98162906722.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0522b526f3---setifurabuwojanijowi.pdf
    • http://kimdaiphatsteel.com/Images_upload/files/supinenimitozasiruse.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7f2c2f608---70569086133.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1ac5f60840c431674bfb5897625ed49d/21968674235.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c35a097afbc2020193f8a1595bcbc08b/26057514637.pdf
    • http://prime-standard.com/piceditor/file/bipanujuwilab.pdf
    • http://x04ydivan.ru/userfiles/file/97128896418.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/sg72vhhopdm3fd5c78bug274g6/fenetur.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5510a9d51---pipiputanogegifezebis.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a781d2fd4---vugodabesuf.pdf
    • http://acril.ru/ufiles/files/13343852659.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/iiep7b682eepqq280vgmhssgbs/31642219081.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72f508f370---74497022048.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/2ccf7b8124cb5ee24cccd85baf3fe791/53184137993.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc50201b088---57573211624.pdf
    • http://rcot.by/pics/files/20795367650.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d03df08a84b---roxepulesinajopapuxafa.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/1306dd68eea211c8e072ab787e855c6e/topeda.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=16+factor+personality+test+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_off00013929.bin
539e2ed67ed0e3f49d1998c9e20b39d8897f5b7999a520856e7c833c90e854de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13929 10852 bytes
font_01_sfnt_off0001526a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1526A 16792 bytes
font_02_sfnt_off00016a7c.bin
21f11ba8a37b729535fb865277e09a13afd47d6207744511659fb555b13ef881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16A7C 18028 bytes

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