Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d35d05df5ca0d0b…

MALICIOUS

PDF

61.5 KB Created: 2021-07-13 14:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 44acf53b13031a792016f1b2c284a74f SHA-1: c1d2888a122228af27122f047c614fa98a0ec33a SHA-256: 2d35d05df5ca0d0bb0413f95b68ed3996261ed6ee23672015668d17b97e19bb2
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests the PDF is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6508

Heuristics 5

  • 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
  • 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://albatrossmrn.com/konadnew/userfiles/file/52222405262.pdf In PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0e7341533---ginalusuxoligorexajubot.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/wujedapuworazudixasosu.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/15822053643.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc02ae5fa54---84669679569.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3b18116fc168155f3dd1d63c22c0f2de/nejawitixakapenof.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2fcfabf602---mopex.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b4bef3622---vukevobejikupobena.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/powubufogitofotevujugeva.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/galogisuxoru.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a712f57b62b---xevuxeju.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/zimukagufem.pdfIn PDF document text
    • https://belhasasecurity.com/userfiles/file/36572882748.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dab6192e6a---juxasunolas.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b161bc8c767---lulorig.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/ih1qulr0jmek1jjq17gthejta1/40323510589.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/11401411025.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcb9c334e3---nadegukirexikowerubug.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ac32bb3d6---81578570267.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/3607ff871b74441da91fdc4e8353e55c/26205544106.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/zavijogadike.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1428cc91d9---niroreze.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607db10a99425---daruminipelawuxosuz.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c0707252ea86b4c364e0f5af80abe203/81310353290.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/bilasiditazupuvukexewexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=dark+theme+android+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC1 10524 bytes
SHA-256: bbe126da6c0d1f9b7d0c982af210f8b3c8f1c734cef8e0ea69ba6f9bb79ea0ee