Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb975a10d07ac1ae…

MALICIOUS

PDF

98.5 KB Created: 2021-06-26 05:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bd14e8505882661a8b3ae4759fff9497 SHA-1: e7229a6e3d079208b67fb37bd28b3eb5d6fcd7d7 SHA-256: fb975a10d07ac1aeeccda7955ae794b3453b7539fc51a4ae251cbf7dca3f93a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://krisoc.ru/uplcv?utm_term=personal+growth+reading PDF link annotation
    • http://hasyo.net/files/file/donejagojesofosipanadabox.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/lajafutububulizejokunegix.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/7860549a2c554b81b4616820d675e135/46011017088.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/tbuppp0urss7ac6mm80fnftdbh/kikisoxedu.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/4948763363.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cfb73d8e0---62307381450.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/lemafemubaxoregeribojolo.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d37cf73ffe5---tunava.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/fffe02156120b4be574a5ed43d8eb5da/90369697528.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fffd4a6ab8cca6711f0c5ea7523c33c4/39268511558.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/1809704034.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/46f6dafa9367896bf5cb96042de25ea6/negalelisuwu.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ae2e28f3e---53548044167.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/25394742527.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/33452441504.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/19250843576.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/borexokinevafifekawe.pdfIn PDF document text
    • http://benrassam.com/uploads/files/1343401290.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929d8e24dcb---8969832534.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/79125323450.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad29e39f759---ruxumimelipafikib.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/34868284270.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc244e84092---fozavudo.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/5f9d7ftrkd3do6fcdf07dj8ju5/61230403481.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/e79095278f1c0e8a36597aec2c28119d/rabipofemetinuzowime.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_off00011d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9B 17468 bytes
SHA-256: 24831b6436f2e1737bf7cc21eadc884e8d2f5c24ae59f833afeb50ffcda45a8e
font_01_sfnt_off00014b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B0D 10616 bytes
SHA-256: 6b3bb2b08756e154e17acc861fffcdb26bfbd4d7d9b737a7a88b861da94eedc5
font_02_sfnt_off00016321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16321 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1