Malicious PDF — malware analysis report

Static analysis result for SHA-256 06433a90e4eeed2b…

MALICIOUS

PDF

85.4 KB Created: 2021-07-20 15:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 751abaa68a42f929dd97dac03b87084c SHA-1: b18e32a5ec5550c9ab73a9f875988d901c6e9fd2 SHA-256: 06433a90e4eeed2b7969d1c7d5d6f1ae645027ffdec419414622b20b3e2c9a2d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains JavaScript actions and a significant number of embedded links, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of JavaScript suggests an attempt to execute code, likely to redirect the user to a malicious site or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aelma.com/sites/default/userfiles/file/52104129854.pdf
    • http://reclameindex.nl/images/uploads/wakaniwogorarojexixola.pdf
    • http://www.klimavill.com//data/editorfile/60906292754.pdf
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/woderopibegixofusirud.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1e616775a---57620533635.pdf
    • http://cp-tournament.org/ckfinder/userfiles/files/54941087843.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/10e7fa78dd180acf9fb53ce4f5ed27c4/zewuwezonenikupilaxafad.pdf
    • https://zionapostolicministries.org/uploads/file/84656462806.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608568f801ab4---kibateden.pdf
    • https://datatech-int.com/userfiles/file/21087435700.pdf
    • https://lienlacanien.com/img_pages/file/sugumapominasive.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609409c064d2e---dasef.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/na1oqm92g6093kt7736ndv0nhi/wabumodosapixasedijezi.pdf
    • http://talleresjpg.es/img/file/gumona.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/0c08114e7bf4efb887f9266b219a0e2f/jitapelanop.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091bb0770953---67529997427.pdf
    • https://contabil-fiscal.ro/mm/file/zexenejigopet.pdf
    • http://bestbelly.org/content/files/files/gufikaj.pdf
    • https://zlatartopalovic.rs//files/wisarupafixufarazedo.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608897038d262---94534902507.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b12ce6f54---wijawe.pdf
    • http://rauvuonsach.com/images/uploads/files/35044915175.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/21m1tsuskqp8n2uri7otd6qqtn/67839351337.pdf
    • http://www.pattyn360.com/upload/forum/files/fatemazimazexibararav.pdf
    • https://businessservicesuk.com/userfiles/file/62330102264.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=if+you+are+parked+on+an+incline+with+a+manual+transmission+vehicle
    • 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_off0000e8e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 16792 bytes
font_01_sfnt_off000100f8.bin
80419a3ba8e4f541dc22b217ce61c90614779f1f2e32ee9a1029c314ff8c2779
pdf-font-stream PDF embedded font (sfnt) at offset 0x100F8 16924 bytes
font_02_sfnt_off00012cfa.bin
8cbc7c3a4541f5eacc48e781fdca924ce4055c48d60b7cd3e3c227a2fcbfa830
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFA 11292 bytes