Malicious PDF — malware analysis report

Static analysis result for SHA-256 396690e4d40e26de…

MALICIOUS

PDF

94.2 KB Created: 2021-07-05 08:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a9391de9806a7cdfd78d31792769782 SHA-1: bcd859757424372dfbaa50ad8cc1b35f668a9860 SHA-256: 396690e4d40e26de2ff694bb2450cb92700504fc9f8664f7f2769784a717991a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other potentially malicious URLs. The presence of external URIs and link farm heuristics suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://medvor.ru/uplcv?utm_term=bully+game+android+apk
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809c2b2a881---48728336693.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/cknf8pg94t8687tlhf7d98fem3/dekozegegaromezit.pdf
    • https://100tmt.com/uploadimage/files/20210623030810.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085ef794b66e---jipuvejajeduparutatatof.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6ff5d4935---61597126697.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c6c7e0512---15607025915.pdf
    • http://sklepjola.pl/userfiles/file/nuvijinoj.pdf
    • http://acecaalcoy.com/userfiles/file/fexosizarepupof.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acceb841efe---nagamiwazibisezeboroj.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a6dc14b517f0eea9cce2282f677d2182/70154231572.pdf
    • http://teplolux72.ru/upload/file/44750024980.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d548432a1a---91896761907.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/raf6mk3o5afrl49au891flmh8r/tibigepurarufudo.pdf
    • http://evola.it/userfiles/files/jebisajifoduwa.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/c8l6flg1pr3v3kvq990lpo95n2/50182079833.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/aik9s58u29thjvnc84sd00670l/mavabesesulepewe.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12c7509c2---31375368038.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086d80337858---rowukuzuradew.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b348e73b9d---sejalusilonumegikaguw.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7de71dad5---disobanamipokenipige.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084be5f6b5a7---febotiw.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0d990ecef---vigaginudakaroxodipaxoti.pdf
    • https://bedandbreakfastchia.it/userfiles/file/11092764227.pdf
    • http://akicgiyim.com/userfiles/file/goxawejiroseb.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_off00010d05.bin
6306b8c102eb032e3be612e60e02b1e0262337a3b8397e2d42dcaf052ddc77f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D05 10828 bytes
font_01_sfnt_off000125b5.bin
89fb44026eceaf5e1c4bdd9cf22f33984c6c55d8dd855d3edd135db6bba19fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125B5 17504 bytes
font_02_sfnt_off0001538d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1538D 16792 bytes

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