Malicious PDF — malware analysis report

Static analysis result for SHA-256 00be14218c9702d2…

MALICIOUS

PDF

83.5 KB Created: 2021-08-31 07:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f551d2bdb1ae3595dbf10c4f20fbb9f3 SHA-1: 8efe1081d98e54bd35a4b282609ba2050d9882fd SHA-256: 00be14218c9702d2842a170bcf715239addcee0a11c510a03cf3a8a039136e9c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many of which point to compromised CMS uploads or disposable hosting. This suggests the document is designed as a link farm to redirect users to malicious sites, likely for phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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://shiinamotors.com/js/upload/files/98364678541.pdf In PDF document text
    • https://sealand-pptc.com/userfiles/file/2045890443.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210804234542.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0daf959455---xibovejawutez.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/36b534c8b12988a6eb7fd46aca06b3d5/sapudaleto.pdfIn PDF document text
    • http://poiskvod.ru/images/file/lawirogududiwa.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7956592507d292a316e8c4e39cece9d2/18045304325.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/jipazopebifiv.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c39f43d946---76996037335.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23ebeed41b---saganadugimafa.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/padedide.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/tojimawetazinogipogorikar.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/61792297204.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4374b42bbd---wewatogimav.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/93408503264.pdfIn PDF document text
    • http://csss77.com/clients/d/df/df7f2fdc42e243c7a03c192a8228c0be/File/ginid.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/wugafomilivumolekunogu.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/6460279899.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/fiwisateduz.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/duluga.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/88150854775.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=i+just+wanna+be+average+mike+rosePDF 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_off0000e0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EE 17504 bytes
SHA-256: b0f2555f7766b14e9ac2890728fbe9e814afea98b3540d5862e712e558d1f322
font_01_sfnt_off00010e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 10968 bytes
SHA-256: 847523ce3a9c67ca5d6ff473f092e554fe0ebdc8a9e4e9e3736bf49b6439eb8c
font_02_sfnt_off000127e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1