Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4353f2de658f12…

MALICIOUS

PDF

82.9 KB Created: 2021-07-28 15:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f0019c854bed47e44be4de0ff9c0431 SHA-1: ed2d7be3d154f7ec9e1c3dd19e9ed1cacbc6c0b9 SHA-256: 6f4353f2de658f12c5591b3e055429b41a7c8baa41ce3a044a9046d76793bb7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it's designed to lead users to malicious content or phishing pages. The presence of embedded URLs and the nature of the linked domains indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://ibb-online.ru/f/file/karakarosawejazelom.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/6109qbn0pusobodncd281dr81f/38224228291.pdf
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/mezokopinanesud.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9ab7ca589---makapisafobegoxobo.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b33d445f2---gigozunapo.pdf
    • http://amexeuro.com/an3_Uploads/file/5213506599.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/tl77dvo8gfuj3n80pvl5jtbd06/8198875311.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dfe46272a---xenumenene.pdf
    • http://centralgiving.com/media/userfiles/file/54238640321.pdf
    • http://dichvuhieuchuan.com/upload/files/nebowif.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160fb8f4a1334e---zokosilan.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3fiv03octdts8s7cd3jv08jfk0/70527588649.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160708dd944ef3---62207670919.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1717c2a87e---88824968318.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/76705656986.pdf
    • https://gastriklandsbf.se/UserFiles/files/11313773684.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799d486b703---nabogubuxirikaxuvabex.pdf
    • http://puntolinea.org/userfiles/files/28831337798.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b605fb1362c---kudegujawabavafatobabova.pdf
    • http://fzcce.com/aimgs/uload/files/36063213308.pdf
    • https://www.aeap.com.br/ckfinder/userfiles/files/25647428350.pdf
    • http://placc.info/up_image/45615657334.pdf
    • https://foulardfotografando.it/file/walemesuvavifexolagiwazig.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/0c26be3c513c412bf04952cee9c59dfa/xuxosapagugeduwuwa.pdf
    • http://dulichgiahy.com/upload/file/dadivajovozizudodogofawak.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/f0b0215ea534ca09ac826f73bfe1d74f/49206833140.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=b%C3%BCy%C3%BCk+kare+bulmaca+%C3%A7%C3%B6z
    • 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_off0000dc94.bin
af5de887d3e85bf7c21f6b393efbf2b5d48fae702fbbd43af93416421f441643
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC94 10972 bytes
font_01_sfnt_off0000f559.bin
cd6a1e65e423d4b5762d23c9ad33bdf1e03461d010ea63168eeab8898d7435ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xF559 18968 bytes
font_02_sfnt_off000123aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x123AA 16792 bytes