Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc08036abfe8acd…

MALICIOUS

PDF

79.5 KB Created: 2021-06-14 10:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 31751576d36964f162e7b9365ade2afc SHA-1: e37dae33c506d47e5a4fac52ff828c6ac43e22b8 SHA-256: 0fc08036abfe8acd406a1db5f5f964dfb018ec8ddeab5063088c1a46fc951504
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct instructions or lures are discernible. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

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://synerhu.ru/uplcv?utm_term=shiva+trilogy+author PDF link annotation
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/10c968659aea9d2a97e9725d5d1f4eac/supetefogifubu.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/funub.pdfIn PDF document text
    • https://12tiga.com/contents//files/fefemapubezujigex.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/suresegujodijofozewe.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/xosibebidevafusujexov.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609afebd69a8b---nanejowebo.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/4615868853.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6afc61e313---56568251556.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/0daa55d4784a981f81e308ee68bc12f6/nebodiwugufi.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f0841b236---tuvimidobagefuvex.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/9acf677de7c856274b82b85407984612/64946426761.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7083124e97---torolumulasefuga.pdfIn PDF document text
    • https://morabia.fi/images/file/xesaxiwerume.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/47577419776.pdfIn PDF document text
    • https://congchung7.com/upload/file/61798065520.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/zomebepefonivori.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 5032 bytes
SHA-256: b3f14c6c2fd39d15be97934be94f0453dd66b202cd274c01c4ea022b42053106
font_01_sfnt_off00010d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7F 10412 bytes
SHA-256: 79bdc89cc7f98fa9eb3ea2886808699cf856e147a49eece8c0d54c2b16bef680