Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f49e7303028f2a5…

MALICIOUS

PDF

85.1 KB Created: 2021-07-01 17:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: acc0e14038f578c897084ac049cb8cc7 SHA-1: b8c38fc8c87cff3734628cd735349db3e534554f SHA-256: 9f49e7303028f2a52d4670d77d5cb1e06d91c12ecd7f18f0e2c747c2a54dd341
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting domains, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

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://yuss.it/file/nomamonus.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadf2ed30b---fifagejutojiribes.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c700c13de---mesopunube.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093a5825b70e---66086536194.pdf
    • http://taxicityplus.ru/userfiles/file/tutaledujozoreridugak.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4ff0cf790---kenikikipav.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160876dbd82df2---xedopogizaledunej.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5438abb911---14867491980.pdf
    • http://es-manzokudou.com/yamituki-n/uploads/files/simowedukebemafijotefenib.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98ac8d9e9---76854855000.pdf
    • http://nhadatv.com/webroot/img/files/bajakujipafologi.pdf
    • http://aite-materials.com/upfiles/file/sunesarud.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/004ae4505e00d99cf9724a1f9d6e62e3/wexaronoruzezekawel.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/64684902954.pdf
    • https://kabelkyaobuv.sk/editor_uploads/files/60221033039.pdf
    • https://moto-trend.cz/public/files/fck/file/39761199107.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/feximukunarawobudazeto.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eed3bcf48b---27096921693.pdf
    • http://grupophi.es/uploads/files/pasizenab.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dcd07a25b---gisefumogapawipuxore.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/b7440867bc33749423321d2f1c01e44c/jomugivoxuwimoz.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/112e60cd6e6624baabd85d9717439664/34732102629.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/a5165d864c67aea9c910ec3fb67b73ca/xivapoluvugekekotur.pdf
    • http://ngocvietbungalow.com/upload/files/nopikofudemaneli.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609410d1a3693---74101632016.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+balance+of+power+wow
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea32.bin
e255ce12f2d76775533bd7851289816c12bac40f3225658923df27de8ba38f94
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 17624 bytes
font_01_sfnt_off000117ee.bin
08a81e5be4ee6f64093993a3040562d0dbd28d750cec2a18ac53640340cb17c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x117EE 10408 bytes
font_02_sfnt_off00012f45.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F45 16792 bytes