Malicious PDF — malware analysis report

Static analysis result for SHA-256 c696c85e4900155f…

MALICIOUS

PDF

88.6 KB Created: 2021-08-14 06:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b67e9c104b2423bb73ab875196e79ba SHA-1: 09655969c74de3654eb9f8a12764aeb358a7bdff SHA-256: c696c85e4900155f6c56a2314af8e09fe73ce1246a5e650da3fc5e1fbfa0f380
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains a link farm with multiple URLs pointing to PDF files hosted on compromised CMS sites, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farms indicates an effort to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://ahkjt.com/upfile/file/zuguxejona.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/2a6c727b1f796a872f64ddab42ad5486/bisanafujirowig.pdf
    • http://tragiaocolamsapa.com/userfiles/image/file/78946111951.pdf
    • http://montagnobozzone.it/userfiles/files/tusetoxifunovus.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dc9c35b5fed---15282846404.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607946dc9025b---85411925549.pdf
    • https://audit-advisers.com/userfiles/file/depaf.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16077d830076a2---53882897685.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f22d5f001b---pefelojo.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5cfde6e47---zabiruxujusajisuvu.pdf
    • https://tonitomov.com/picture/file/fegokotorizoruxomatoretu.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ed9e0fe8a048f43f564481e3a7e6327e/59049773904.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/dou45f4smhvi0bvb1rieh2hrf9/laxizefemigulirepu.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/fae8f5dd14187ed2da3a7f3b10ee9d22/wofinasibizagopufuvi.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/qo58cmk76emr1q6t7cf0t64s50/32634703981.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077da80944b1---11853788710.pdf
    • https://bunianco.com/other_files/File/noreregiketutevusenosopu.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/6acjtkeojl8hngc5ig9ibl5go7/zutusugoxaz.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/4b2ad2296748fa08543d3d521e4670e2/daluwobijimu.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/aplsnot9v54jj0ah97ju4abic6/dowejatodekonolukizizifet.pdf
    • https://linhngapt.vn/upload/files/walutubetibefuvipide.pdf
    • http://edukoc.net/userData/ebizro_board/file/82423836489.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=rio+2+full+movie+download+in+hindi+720p
    • 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_off0000f7e9.bin
6519333c2c3f052169efa5d2bc7cdc33e0c2d62a660495e18163f12e12662f5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E9 16640 bytes
font_01_sfnt_off00012331.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12331 16792 bytes
font_02_sfnt_off00013b48.bin
14eafa1e7f592a99d9f14d8e36052a427e17f5196a14781cea7718007b893582
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B48 10988 bytes