Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48f734666648106…

MALICIOUS

PDF

81.2 KB Created: 2021-06-25 23:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2546970fead7f474bb6d8466a278edff SHA-1: 65a728b619a4abb47e7d35096603bbc2de29d470 SHA-256: e48f73466664810636d3899ad36136eddfcf908c8a2ce1100d575dab222821d9
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites hosting other PDF files. This suggests a phishing or malware distribution scheme, where users are lured to these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16088717f31a12---vefitib.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071531ce0730---38196855415.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608828e41a1e5---robavexofos.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3aa2e668a---mobinakapudarovezazusamo.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/87c49a3ab38bc5bf6d9fff79269a010c/14266663907.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160805b741acbe---38001321146.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781bc352587---turatulilako.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a34404f67---febiwegemidimibagaguseno.pdf
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/lizexaderatagobonavubag.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd474f99bca---rigurerota.pdf
    • https://queensflower.nl/clientfiles/zirogaxuxivuko.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc946af1b---80913076079.pdf
    • https://diaspoassur.com/wp-content/plugins/super-forms/uploads/php/files/8d3f5c9333c5a78c07d9e2bd8bca6319/govupomivifubitefa.pdf
    • http://jnnycc.org/userfiles/file/nisizugijimilogukaw.pdf
    • https://aiwatopup.com/ckfinder/userfiles/files/27126874234.pdf
    • https://harkakotony.hu/UserFiles/file/maxalagedi.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160710cae3db6c---51010446947.pdf
    • https://wittnebel.dk/file/98547611606.pdf
    • https://pharmnet.cz/ckfiles/files/files/69598898367.pdf
    • http://chiari-web.com/ckfinder/optimist/files/gixedikejanevi.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/fb29ff1cb71e6a7db004e19f130dc156/98281890692.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/7e4c6ddc91b16ca1bfc3eace27c19f86/sifomajeka.pdf
    • https://qpshouse.com/upload/image/file/72134423656.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827ada76010---sudujegafiwojidoxanoveguw.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc31eaccb---sagafewuw.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/e3a7b385c04a159e27767d48bd669034/2408966651.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=hooked+on+bait+%26+tackle
    • 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_off0000dbfa.bin
313cddd7be833344d1f0cf084078f3f8dab9f8f2a42d95751734542c138d6bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFA 17096 bytes
font_01_sfnt_off000108b0.bin
7a4c5b652918c65edccc8926d181f27e4ba1342f841fda80b0e056d1f3c60f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 10152 bytes
font_02_sfnt_off00011f74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F74 16792 bytes

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