Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c21936f6fa5f64…

MALICIOUS

PDF

86.6 KB Created: 2021-07-02 21:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cc42a716c5c1759015ac89816de768d5 SHA-1: 5a42ebb8bda705c3c10f31c8559a98c3e9667aad SHA-256: 69c21936f6fa5f6435435a6ad7ef41b24102c9451f252c1b1509a98157d8a45b
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_ENABLE_LURE' indicates the document likely instructs the user to enable macros or editing to facilitate further malicious activity. Numerous URLs were extracted, many pointing to potentially compromised WordPress sites, suggesting a link farm or distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/f47334648446c82d84dc88b733e283b8/wikemibodanobimuxe.pdf In PDF document text
    • http://aceonlinementors.com/userfiles/file/jizijumex.pdfIn PDF document text
    • http://sitepride.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/53680738220.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba70a8cb790---jupenenezidanixisajusowed.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/varujok.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/14718980834.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/peduxes.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/20783889161.pdfIn PDF document text
    • http://marlin-aquarium.ru/ckfinder/userfiles/files/zolobefazukoxep.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/dcdeebf0e8ece1964e5916baabbfb462/20199751378.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/pezamugivesewerap.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b30da23b2df---bizozazumun.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/vkug95fnurugcja5dc16aa4v8m/kezovekerokezi.pdfIn PDF document text
    • http://amdind.com/userfiles/file/vozerifuzorat.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/didikifitadofopekodijib.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/fcef31d0f3dbda4a03dcaca970ce313c/badobaj.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/dalanixexuji.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/25484902745.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fa682452a---61447177651.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/77432300025.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/9725b14ba1b55eb7c7a5ece2e5ffed63/selifibeze.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/gumodezaw.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/v6n8g8ib13cmgj4j8amr3v23bb/49594678478.pdfIn PDF document text
    • https://arerp.kr/data/file///rujel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=devaluation+and+revaluation+of+currencyPDF 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_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 16868 bytes
SHA-256: 5ceb7618893c9f2cd88f8720734518b81ea6a86ee14eeb5740a0e249ae3984e1
font_01_sfnt_off00011b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B07 10580 bytes
SHA-256: 484270c736865121a7e1be71e9cab3452435f579f5fe533e0c7fe467b202f082
font_02_sfnt_off00013351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13351 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1