Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bf89bd8bb65a83…

MALICIOUS

PDF

92.9 KB Created: 2021-07-01 09:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: baf3729c734954e66fca10377d98850b SHA-1: 3f27354dcc49ee33ec551825fe03d7208a9a072b SHA-256: f6bf89bd8bb65a8374bcac15108a9f89c871f2c53c81a77b6c1b901e08793087
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/ed2740967b0f5258133efdf25f1ef6b7/ludakimanixuvav.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56820c0a5d---23620252102.pdf
    • http://fine-cottage.ru/userfiles/files/99384937359.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/f5e3d8184e394a02972b009ae3ef6223/33261687151.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/piwederafujipabisejina.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081aa284fc6a---wixeraxowazosoxatemawore.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160abc86f61407---96695065755.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ff19b5a1f---19525990488.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/88d16f98162ff03908769d2ee8b9746f/wufiwolutex.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/194ad7bbf8935620cd7f1b01ed243a4e/xubumivuwezapole.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35d6d1f041---60308954409.pdf
    • https://milsagliksen.org/upload/ckfinder/files/20200710866.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4c04ca09c6054f3e84e416f18245ccb0/sewebugirazewaxe.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/a9afc895305041af7740107101f215a3/1998944077.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a318f989b08bf80d7f5bf8a6c447c9cb/83095271321.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e2289a411---9812815889.pdf
    • http://reelproductionshd.com/userfiles/file/lalijulimanano.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094768863f49---69172950024.pdf
    • http://nuraski.pl/wsg/userfiles/mekix.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2aa14a9c94e630a362f05f5dabfada4f/28674589213.pdf
    • https://kp-bs.ru/upload/files/fives.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc1e18006e---11355132311.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3661a9fe7---dodix.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a96af35bcf5---78810305161.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=dragon+age+inquisition+judgement+the+good+works+of+ser+ruth
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f019.bin
7d25f88fe897b2f42b23db3bc800fe8c3f173c60e4a484018f38555a9c328a03
pdf-font-stream PDF embedded font (sfnt) at offset 0xF019 11308 bytes
font_01_sfnt_off00010a01.bin
3a4fd5584c5fbb74ef37bf091230bfe9615f13856d0e8a0cb9f43d5997030e29
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A01 17348 bytes
font_02_sfnt_off0001370a.bin
56087f09d8133d1c8dff9579cc958a39d3733cd1f6636772d8edbec25b2c4e51
pdf-font-stream PDF embedded font (sfnt) at offset 0x1370A 16364 bytes
font_03_sfnt_off00014d23.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D23 16792 bytes