Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b46b0e030239bb…

MALICIOUS

PDF

74.3 KB Created: 2021-05-27 21:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39b516beb48329667db67f32128bf6dd SHA-1: 8c5f7a2754a1fe4c16fc5eaffccf187b8474c6a5 SHA-256: 57b46b0e030239bb08e6ee20b2d4a3bfa5f65d5d1bbf2db71e197ae672c27205
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to lure users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document body, though heavily obfuscated, contains text related to MP3 downloads, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=aa+kahin+door+chale+jayen+hum+dj+mp3+song+download
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609466bf76cf5---83521040715.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa499453b61---xadularewifa.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/62d12d3efac0793d228d2d43ddcce952/jekukow.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160718afba679e---kibenuv.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa78799149c---jokog.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085eb0d0a154---xiwifazuliwitapo.pdf
    • https://festival.bg/fckeditorfiles/file/54910875640.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abfd90e7fac---dunixejovodojowoxutaba.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/627070732032e48620f4ddcdcd9fc1b9/jategowuwazimutepa.pdf
    • http://sungsam.net/userData/board/file/tipolonolapik.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160abd8e88a5dd---jogexi.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3a803072f---33619020210.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/f6c60e9ada25a9db9310af7fe6e4c952/zelalofigenar.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160998dc672c9e---pidewe.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/9dda2078541ac5d7017b61b9310c87c5/tadolufekajusafisimejinew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • 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_off0000ca6d.bin
c5249f2cc2e7bd3dc43812e5f38b18ad44d0da3af5be7426c19f4c4c5ff92a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6D 5972 bytes
font_01_sfnt_off0000deb3.bin
d7dde46fd50392825ca5c39b39ae1297ac5007cc971e23a38385d4591f6fe805		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 10032 bytes
font_02_sfnt_off00010116.bin
436829979245b7126098886beec731c3e32f79caaa22165f5cf5bd484c81a714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10116 17112 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.