Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac46c16a2f9b1fc…

MALICIOUS

PDF

158.5 KB Created: 2021-10-09 18:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8a54f7d948653b6f55e558668d2f310f SHA-1: 72b46f534d5a0cf9aaac77af08ad29bb51ffad43 SHA-256: 2ac46c16a2f9b1fcd3f04950eda631eada21a39c490ff06a3680ef0330fc309b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of multiple URLs, including those hosted on compromised CMS uploads and disposable hosting, suggests a link farm designed to redirect users. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://nomylo.ru/uplcv?utm_term=enima+is+good+for+health PDF link annotation
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161409f05ac909---fudal.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/778e9eedadcfb635236fefeddf62da5e/60514967512.pdfIn PDF document text
    • http://srs-budapest.hu/uploads/files/84372695072.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/48447073728.pdfIn PDF document text
    • http://keacg.com/upload/files/kurafebigutowal.pdfIn PDF document text
    • http://vswet.ru/f/fazixikivekibuluzumiki.pdfIn PDF document text
    • http://fk-fudosan.1nino3.com/app/webroot/img/userfiles/files/42006322776.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///96091187863.pdfIn PDF document text
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/napiwotajeji.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/80418673456.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58005753870.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161543d320c5fd---renopiboxisi.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/18039494061.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/ponogipanaxasulitur.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/8332906571.pdfIn PDF document text
    • https://securitydm.com/slicice/file/tekutowon.pdfIn PDF document text
    • http://js-space.de/userfiles/file/27306520206.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/fuganedosoz.pdfIn PDF document text
    • https://virker-ikke.dk/files/50310448120.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/boxomizupedukumivapodowe.pdfIn PDF document text
    • http://gapp.fr/medias/files/33948062306.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c953346f2d---kutepogit.pdfIn PDF document text
    • http://mtt-association.fr/upload/file/dotigo.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/ruvosatotatat.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/77283418999.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_off0002013d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2013D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00021954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21954 10784 bytes
SHA-256: f016b51a465fe20b4f55093b178b50b353eb059d1ef60081ce92a6bec2e4ce2a
font_02_sfnt_off000231ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231AE 22612 bytes
SHA-256: 1d10a958e0ab1c47cf30fdcf36fe8fc0e4720a8628657548ff2b5f52a6658d49

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