Malicious PDF — malware analysis report

Static analysis result for SHA-256 b685bca555e74246…

MALICIOUS

PDF

76.2 KB Created: 2021-07-02 02:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9e9d81988ed209b85b3c550ab8f81cf SHA-1: 5df1a3d1d1371eac36e1083889e9450a79d5b88e SHA-256: b685bca555e742460693b06bee4d33d732b4fb829b3aa6f7ed2ea20c2bc894e7
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://laborke.ru/uplcv?utm_term=tracing+letter+nn
    • https://mdteam.se/ckfinder/userfiles/files/dolubokejuxemusujajiv.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d868c955a2c---vijekugaxepigutexodixi.pdf
    • http://teerosy.com/ipp/images/uploads/files/95878556748.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/bc68846e497e6437e7986a0157f88d9d/88409813104.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f5fb1dd8d---sepojiturukoza.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/a09e549ae9cf184d7fd58970fe828136/sutadakomat.pdf
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/rolizibowerakikas.pdf
    • https://menu2uplus.com/images/file/vujimodaka.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5a57a22b---delufituf.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/61a7df2d4c0addbf3cfb13356b2fd08e/28136772338.pdf
    • https://sportsht.com/userfiles/file/witabawaketanibotozaxud.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01aaa9001---7516148818.pdf
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/5939564568.pdf
    • http://rollfactorytogo.com/uploads/files/dekanetebepoj.pdf
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/43128021127.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a080381e2aa---femom.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/7bd7fda8c9ceb03e0cb1c2fe56f760db/subexubororetaguri.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608830da9536c---91028695441.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/c10388a8ceb91f101ce8c7777448c81d/gevokufad.pdf
    • http://cjatkinson.com/userimages/wudegonot.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/79001813847.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/thjhr08gudtjmjc5uiao7j05v1/votudimejeduzenegaxatu.pdf
    • https://rpitrade.com/ckfinder/userfiles/files/18242997.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16084a2f95d788---vuwozazepedemunaka.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b29cc3f284f---nudil.pdf
    • https://pabrikangka.com/contents//files/nominofin.pdf
    • 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_off0000c9cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CC 16792 bytes
font_01_sfnt_off0000e1de.bin
79ba05e70a659cf6ba08dd5bdbb56b86193f4028b8811473c070e7d82cdd0707
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 16644 bytes
font_02_sfnt_off00010d4a.bin
baff4eade50559826e7cd58bd62fa7472b301d7fab37e9b1499bf8c69eddc861
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4A 10080 bytes