Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c07c17c6b9b948a…

MALICIOUS

PDF

70.7 KB Created: 2021-09-06 09:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 84ee9ab8e708070b47d332504cef860e SHA-1: 956e0789ad5921e2bb394a1e86d8cde92a1be9c9 SHA-256: 7c07c17c6b9b948a7ddae1a54a4fef699be9214430e875161bb032899b6344d7
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=consumer+math+commission+worksheet+answers PDF link annotation
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/24435e9e022d9fcbd63679fff24f46dd/sojevasafo.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/pefokideruwunizewep.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbfec9132f---lawuvul.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/68183456932.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb12f14831---66366061185.pdfIn PDF document text
    • http://lokalsport.no/userfiles/file/ruzafuvisevevuvapar.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/76613169452.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8f2969f62---57496922796.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/bavosuxonapavore.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/migosebumoredatu.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/ganiwexosekopovuwisibazi.pdfIn PDF document text
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210822_54A3A6CDF458AE43.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1df251a68---28322984370.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/budovuzunaw.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a6bb79224673980ecd444e39ef8a967f/57707545924.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/44752213268.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a809af0bb---sedodofajodoturanomaz.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/tezesupupisodukewanuxil.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/xikusuxaxomuzo.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/58993079671.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db47956d984---zagesevuvexuxi.pdfIn PDF document text
    • https://olterus.net/contents//files/tezelepafapupazalad.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/2lg3tp9fcs3n5sug782k8oeme6/99341384156.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/rosukosifoxalomedik.pdfIn PDF document text
    • 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_off0000b5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C3 10756 bytes
SHA-256: 1dca58ef486742391304faa40e0c033e0762d7910f29d5011036570cb54cc72a
font_01_sfnt_off0000ce72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE72 16220 bytes
SHA-256: 0d1a69a6c4388df6f82c5c2cbc550b107d43b6ca29f00f2c86cb66f31d418f18
font_02_sfnt_off0000f57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1