Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad2fb05235fd802…

MALICIOUS

PDF

80.6 KB Created: 2021-07-27 22:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fa7164f8ae519f79f7f8ae8730732a02 SHA-1: b6ffcbb45fde1cf39229bb493346a675de8f8f4e SHA-256: 7ad2fb05235fd802cbb3bea5592a7d6c676105e9303e260c2803e6b4d6ca3cc0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress installations. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/c4da0bda656cea788b693a064144e2bc/84180904395.pdf In PDF document text
    • http://language-coach.pl/uploads/files/muvasixekuledotafeku.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/misolelukej.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/97071900150.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/41e0860f91b28d604e6787b7ae540eaa/figisokaf.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06d1b29f63---46334647448.pdfIn PDF document text
    • http://megalaserasia.com/upload///28463423318.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c063f8a5d20---sosetuzisivuta.pdfIn PDF document text
    • http://liyangah.com/Upload/file/61578350527.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/seud46sjc0933rfanv06k91i3o/78966030547.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/4193313006.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d3538fbeba27fc40b3efaf89fb1ecb25/fogepegojodujepabadog.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce40d294fb---livibelonolibuzetabotato.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/regamavizakezazekovi.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/abf0c310ac933bcec1759dc847962108/39014822428.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210513005403143191371.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/vuxotibebemoxosuraz.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1a9d5e1bb---mikusofilin.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/32cvrndrq3i1tt58uk2a5lg2b6/28093705170.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608eec922c67d---tufasobugilojugifepexegon.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74028a51aa---49490906645.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/sikoligil.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/v55ic5qhqkh1g0trul90uvoud0/butaputeliretilov.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/jaxutigexipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=conditional+sentences+pdf+worksheetPDF 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_off0000d4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 10924 bytes
SHA-256: 255bbb804b8d2926e445b619632ccb23213c104549a48c0619e6e882bb1bbab4
font_01_sfnt_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 16828 bytes
SHA-256: 46403ca0193c9376965612f798c794848f9805da25a4a85bdb3a707f345d9ab7
font_02_sfnt_off00011a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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