Malicious PDF — malware analysis report

Static analysis result for SHA-256 44968f63b9846f43…

MALICIOUS

PDF

79.4 KB Created: 2021-09-10 20:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 283317e50185c21d1a2728d509f70544 SHA-1: 067d8bbf57dc5f14e8252dfac1c6c3aebbb748bf SHA-256: 44968f63b9846f43bea180d094645b8ea3a1cb9a2af572336cf8b56608a560d0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous links on disposable hosting, often with UTM parameters, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=8+ball+pool+aim+hack+app PDF link annotation
    • http://eva.am/files/0939943b493b9ab1.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/76375975681.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132434e56e5c---ziwiguramezuxinijik.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/zamafizovano.pdfIn PDF document text
    • http://skncn.com/u/files/22107428321.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/7a93e4e6e9e131f8306262f61bc62209/vudax.pdfIn PDF document text
    • https://onthespothousing.com/userfiles/file/43959647497.pdfIn PDF document text
    • https://gencatakan.com/upload/file/33735181079.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f07d75487e---5504984967.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/nomiwur.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/58419275229.pdfIn PDF document text
    • https://campermagazine.tv/public/file/12028641625.pdfIn PDF document text
    • http://tapestry.cz/images/file/files/vomajopuvufezefasetenisa.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/15698110601.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/12608814099.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/gumevuputegofaxularax.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/12264188794.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/buguja.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/visozifotivebotusalimoj.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/pogorusumokujodezinebiv.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/norutidufanil.pdfIn PDF document text
    • http://bdnchem.com/upload/files/2828188764.pdfIn PDF document text
    • http://tes-sys.com/uploads/ckfinder/files/20210910/16312789464544.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_off0000d48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48C 10380 bytes
SHA-256: 215a1a35ee38a31b4a98f9c619f6028e46c26408ed88f8fe9682a0ea61eafefb
font_01_sfnt_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 17184 bytes
SHA-256: 672e140800b5afabec2f59558a8d4596aea1e706be4c98570d801ced4a33e70b
font_02_sfnt_off00011857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11857 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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