Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6189b67cc519b45…

MALICIOUS

PDF

83.1 KB Created: 2021-06-27 23:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6bb73d6e73ca12d3fec7748203126320 SHA-1: f2942978957fedb7d62fede5a84bbf2a1e5934dd SHA-256: f6189b67cc519b45e3ba585be9db4d16f004ef47dc89a44369b7af48a0c8bc90
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=how+to+get+your+license+back+when+it%27s+suspended
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/gkl1pkjo2b8lu40jk2qj5fqjkl/35769682977.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b07b727a3e2---82147244483.pdf
    • https://anakmeong.com/contents//files/neweposelememef.pdf
    • https://beldaoyun.com/calisma2/files/uploads/20936534227.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b5e998c902513b1cf5bcaf9c2fd711cb/30348036764.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1ed79de39---31622650976.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74e1f900a8---tekoja.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/42610942489.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/5ab1d997a4f260afbfc4a48b5216704e/kuradidunadaraj.pdf
    • http://vizcsap.hu/files/file/kunepabipozipa.pdf
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/49863694387.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/t7ri3vt0lkng9a14lunrlebvkv/vopakodafe.pdf
    • http://bright-inter.com/file_media/file_image/file/gelinawejabanekelukiki.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/ramoxemuwekiwobulevipupe.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/29e5ad9c0fa00e541fd67ead5d1d4751/jarenajarulupojufatot.pdf
    • https://alternativecarrepair.com/userfiles/file/65578023940.pdf
    • http://taiyoaquris.cn/upload/userfiles/files/20210619031756.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c3232db4487---nuvovedetujomow.pdf
    • http://logistra.fr/ressource/site-image/files/zelamusof.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/3de5534c680a1b98981f3edaeea9b429/56887909645.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/0db441f2e047cbba6d6a71dbf837c179/zovininebodujo.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/25614902826.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5484954fe8---wugadisodumuvufo.pdf
    • 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_off0000e2a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 16792 bytes
font_01_sfnt_off0000fab8.bin
795b3443ac7fc4434d3a8ac82f1ab7fdce1691cbb5490aff8667560360ac9769
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 16156 bytes
font_02_sfnt_off00012499.bin
a0e119193af51e49038b4d5407752c7138089a2851d52a37cd2ec75fe2647515
pdf-font-stream PDF embedded font (sfnt) at offset 0x12499 11348 bytes