Malicious PDF — malware analysis report

Static analysis result for SHA-256 78697208aedfd058…

MALICIOUS

PDF

97.9 KB Created: 2021-06-25 21:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80bf865cc9b6eb0a5acc046914a57fce SHA-1: 0efb72f0c960fde5788dd5a88bc358153fba1b43 SHA-256: 78697208aedfd0588fb2e9c3c79ad60526ed4f8ced303bdbe4a81fdc77600e2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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://plastikacz.cz/soubory/files/lebagowafeli.pdf
    • http://benthanhsgfarm.net/images/uploads/files/tejomokonijibuduba.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a629b8344a2---wumerubapula.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c022752b99f---zigixoluzoxisisol.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1884370908---valekutuguwizu.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160712e81782c0---82395131419.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/e85fb54e394faba49bc54bb249c087ac/52050364727.pdf
    • http://otoozevran.com/resimler/files/xuxojavumoxinutafusisurut.pdf
    • http://osoboebludo.com/ckfinder/userfiles/files/72646248109.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f210bc33d---8278691833.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/cd78f06529b38bd53e136c98f31fe011/togagobogibipa.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094d6a2a9fc0---pifiraduwisejutuduruxejo.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092dd31e58cc---57602040282.pdf
    • http://gorisum.net/fckeditor/upload_file/file/bobumadexezijunedot.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d187b016407---40993640144.pdf
    • http://tfforming.ru/d/files/25081467941.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/66756e4e313dd302640b2de57c83ff91/93975902564.pdf
    • https://healthmatters.me/userfiles/file/sulakuzogupamisisoge.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/11440736416.pdf
    • http://wumag.pl/userfiles/file/97384949892.pdf
    • http://files.ibiza-ferien.de/file/dovuzosixobilaw.pdf
    • https://taiwancy.com/app/webroot/userfiles/files/soserod.pdf
    • https://kede.org/userfiles/file/jugirobofedekimawojosuri.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/3bb1b91d8b3c200c837e39ab6b393e13/pabuwu.pdf
    • http://livingkaneohe.com/userimages/zitijajivarewas.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/134c0fa415fd003c6004bde9c2928825/talonakazerasezuxik.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=scriptures+about+fear+of+the+lord
    • 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_off0000f404.bin
2c4dce6a71eeef9cabee0941c210a4a960a0a930259ad98306d83fc14a211bc7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 18236 bytes
font_01_sfnt_off000110b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110B5 16792 bytes
font_02_sfnt_off000128cc.bin
4e88c2cee5234f8a2ff5deed71b1deb6b7552e98b8d352075ec331caaa68e480
pdf-font-stream PDF embedded font (sfnt) at offset 0x128CC 10928 bytes
font_03_sfnt_off000141f1.bin
d19837c780417a03a6de432e69b57dec41a78ede55a52d6de922f81ebafd6907
pdf-font-stream PDF embedded font (sfnt) at offset 0x141F1 20848 bytes