Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b605e471ca2e794…

MALICIOUS

PDF

78.7 KB Created: 2021-09-15 22:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8db6ea1a6268d96156ff7f7f9f92f4b2 SHA-1: 1c05553e36a68f672c5f6d00722b732f4aec9f41 SHA-256: 6b605e471ca2e794db7f97bbaad33178571cb9455788b8b5dbfecf327e82811f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, with a high probability of being a phishing attempt. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs indicate a phishing lure, likely attempting to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=%C5%82owcy+android%C3%B3w+cda PDF link annotation
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/savized.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161414ca09d458---nesedofiritufakudebinapa.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/nosevefomobipenuxuviga.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/68031060076.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/90461255886.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142117976e89---xitesinupolowusazotapufuj.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/fobuvuvaxoxugatidaperiver.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/94991407928.pdfIn PDF document text
    • http://htygroup.com/upload/files/lavifunasowevele.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/fiwidixafigixitovawuwulol.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/davoz.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/58721920768.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/lowubesoxumaj.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/52465964310.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/witeputomidek.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/59791382106.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/ladefemajudixexabo.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/jisojomiwamabab.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210912_A53E3627BF47B166.pdfIn PDF document text
    • http://adveotec.com/img/file/nulogevimodeso.pdfIn PDF document text
    • https://zzhqhi.com/d/files/mufegiwemele.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/36407208613.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f222f3bd1a---19233515703.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021090420074373499.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/kupobo.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_off0000d0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 17544 bytes
SHA-256: 243440acb4250c67870dca539e459d31a5f042741cae501d27b363dba8be2ef3
font_02_sfnt_off000114c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C4 10240 bytes
SHA-256: ebc672aca8a23066d92e00253cf06f1afa3afdd628c93f44c34d4e7618327ed5