Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c343deeb234408f…

MALICIOUS

PDF

77.6 KB Created: 2021-07-17 08:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8eb64b9f331334b1bbd1dc9e4b624fb4 SHA-1: a27a19aaaf82a1b34bb00e60ecbdeafe06c528e4 SHA-256: 5c343deeb234408f9e45aae6babb581decfca182cad625a5df3408576f8a8e8b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains. The ML classifier strongly indicates maliciousness, and the presence of multiple distinct hosts hosting PDF files suggests an attempt to distribute or redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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 http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/51253382689.pdf In PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160721245dcd78---webofakogomufezomatosawe.pdfIn PDF document text
    • https://actor-conseil.com/files/file/9493434903.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc1608efb7---bafokuzujavikiwit.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9b846ebc---90725411905.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/tulagiboba.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/953285d5057cd88133a478f3b8a55954/nenemezek.pdfIn PDF document text
    • https://invest.pl/userfiles/file/20952128062.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/84033469575.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1c05c610---ralubafipidow.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/16251169840.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4bfca65f9---mumeledosefolav.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607971da5b1f3---16619304133.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/62f929ac1568f896a3808d9c2c043308/dimilevekadivekuzenunefek.pdfIn PDF document text
    • http://chemicalengineers.ie/images/vakodaroz.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/97767911090.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609136aea9bc4---19056295160.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b55eae41eb1---52414036917.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608285b3b5801---kiluwakajanuzesam.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/80821973061.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac88487ff2---47371364911.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085302bce977---mosojativipikekifapad.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/miwumetipesonugesevoladi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=cell+growth+and+division+worksheet+answer+keyPDF 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_off0000d03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03C 15540 bytes
SHA-256: cd173c171ee8c5f1784a05d24acc368b15f97a6f2f27b0e783f33e2baa7db29f
font_01_sfnt_off0000f7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE2 10916 bytes
SHA-256: 8b3a294f0b29ac79141c6272b55c262d83d5f6bdf99de54f1e51611372eafc4d

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