Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b9188904977ae9…

MALICIOUS

PDF

89.7 KB Created: 2021-08-05 19:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 444e0284352c2e36d65efed790ce3872 SHA-1: 5b8a940f4cbe65530a02a19e3f0e4d19c6f19005 SHA-256: 58b9188904977ae9bfba35160b997bfa1a9408b8889b4096e896a78164871630
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO poisoning or directing users to phishing sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160afa0914d2b7---gasaromake.pdf In PDF document text
    • http://arcenevents.nl/site/upload/files/taxukezukefarojavefubiz.pdfIn PDF document text
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/92831371259.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607887068c2d5---7218406403.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29777921412.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/xabowidesaputerak.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/50a5d780db341f62012052ac948f54b5/sakuturofilus.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/42b03fbdb20823595fc2464c9efb4646/83253054066.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/36120761046.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/rupilerimurosip.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/np8dm89lmb4v4lamlid916c4pr/24897111186.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/nimej.pdfIn PDF document text
    • https://le27.fr/docs/file/38302138926.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160842ebcb6d91---12332461130.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/kanidisovugojoviwu.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/29233812066.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/46cb53e27572b30888f41206169ae67c/pekegidaz.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbe7ee6a74---fidomudetekutawilafufiwo.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f57636bb045---bawilirune.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e10ad2436---xavejuwow.pdfIn PDF document text
    • http://norview63.com/clients/5/59/59ba6e1aa7224642a1eeb14435756cbf/File/89484533408.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/jevogosupaniwolelizudu.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcd0ba6111---rofubugakuxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=aplicaciones+de+calculo+integral+en+la+vida+cotidianaPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 10836 bytes
SHA-256: 3a3ebc7ae08b4a0f34eab3a1940f6daf44e1aa7e5de5969b2d578574b190780f
font_01_sfnt_off00011249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11249 17248 bytes
SHA-256: c33ebb64e6cd85b397a8229f7bf48fdf5aa69f7391515cd485e768dfca16872c
font_02_sfnt_off00013db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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