Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e21008b2196708…

MALICIOUS

PDF

118.1 KB Created: 2021-07-04 10:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a03d2fa7f05e6d6a25529e104fc8461 SHA-1: 2bd89be4ddfde62f0aa76800d551253512604229 SHA-256: a3e21008b2196708cbbd2b20edf413f396e4add4b0366e5975b06f22c64919a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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 http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e903a6748---32556279395.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7ec65278a---salikekukakoxomesufem.pdf
    • https://www.indoorclub-informa.com/boletines/img/file/53860864074.pdf
    • http://benevolo.it/userfiles/files/gevudevugamagotowuze.pdf
    • https://chptravel.ir/data/file/52169683646.pdf
    • http://agarimo.com/archivos/archivos/48725650285.pdf
    • http://dokumsuzgec.com/userfiles/files/terereli.pdf
    • http://abroadster.com/files/memifipowedafemudewipul.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/a1ejn6piam3g231lp9g9f7d9c4/toverenizuk.pdf
    • https://pima-alarms.rs/slicice/file/43526396242.pdf
    • http://garagehayashi.com/js/upload/files/30701396810.pdf
    • https://onhimalayas.com/ckfinder/userfiles/files/86971310567.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/afaiiluklf8t0tcr5a79jdt6bn/48060660040.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab921c06a71---74124129940.pdf
    • http://ubestsports.com/imager/files/20210617194942.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a3fe05ab0---36740671121.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c03411535---16079518516.pdf
    • https://kristinanamaste.eu/files/linetibazalag.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/8d51elgeiko72ul1fbuj903r5e/wobepejemif.pdf
    • http://interstyle.org/content/xuploadimages/file/bijokev.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/8951322fef6dba3f8feefe23e701fa55/20743893324.pdf
    • http://lbtech.kr/upfile/files/59214378739.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/vemnb4699pj8dnnuvure8l7l35/32747099151.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=weapons+of+the+third+era
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ab0.bin
3a41302439d80c625d90be1ecf3f9e5b1d9c3fe8de8edc3d791b2bec7a1e9718
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB0 16748 bytes
font_01_sfnt_off00016643.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16643 16792 bytes
font_02_sfnt_off00017e5a.bin
af99ca087e1699242025850afd86790809b7a879a3d2930742a7440f5f3d688a
pdf-font-stream PDF embedded font (sfnt) at offset 0x17E5A 10540 bytes
font_03_sfnt_off0001964e.bin
692e4aa274f211936fc98d023015efc0e75fa674f0af999b0fa40dc88baedc5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1964E 15908 bytes