Malicious PDF — malware analysis report

Static analysis result for SHA-256 8242eaef2154f584…

MALICIOUS

PDF

79.2 KB Created: 2021-06-26 13:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56f4b48c01efe66aba68c4c61a5a59e1 SHA-1: 156178f272e730e698bbdba2d2b816ff4a6ab366 SHA-256: 8242eaef2154f584961014bb2e747301014cc3bccb750d204fce188a7f16af6e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple compromised WordPress sites, indicating an attempt to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ce983999---54661777959.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/eec23197fdcfe7f2be1967d4395ead1d/67371470659.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/3755678f6c1c1517d3076e76df0d46b1/reforivetejumedijo.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070d3da9438b---zixajizotamodiwevosewet.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608244246471c---11450442211.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/7abcf74b5417e26f9faf26172cbe7107/koteroxuragosilunoxezofiz.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/e9c525f689f10db846eb78738019af92/574569648.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/fc3b31471fe6d68647f37552949c0435/vukirupunajonemofipakega.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083ed1d10c06---xeginiwubikuxutus.pdf
    • http://domplus.su/userfiles/files/38250840753.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609102c719d13---baxufamezuxawota.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ceb91853a---guzerifiwovusuwisi.pdf
    • https://birgatour.mn/js/ckfinder/userfiles/files/xavepivorabagogugulujisok.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86a4b4462b---lorijebarugagikipi.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747abb206cd---nowibujafawotif.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bae74356b73---tipawegejegofimap.pdf
    • http://wannawwannie.pl/userfiles/file/62953329924.pdf
    • https://eucolait.eu/userfiles/files/muwikufojife.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d48233d181d---dapezib.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/6e2bb4c205fb0cd0f5814e3e08c5e6f1/68268017623.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c170eb5b9---tiwos.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/063074432243214a26fa03c1fd53dfc6/tonelasabegalizuf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=a+body+of+mass+m+rests+on+horizontal+surface
    • 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_off0000bb74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB74 16792 bytes
font_01_sfnt_off0000d38b.bin
c927c40196b8d8655a4ee2df15ac92d23e683811a0bd39852334349aa8ae8189		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD38B 11136 bytes
font_02_sfnt_off0000ed69.bin
896a218ab49838d4a6a58bd61cb42dda4af947df379632d5f7dcc477427dbc21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED69 16852 bytes
font_03_sfnt_off0001194d.bin
0f3ab7de6b3b58db07283e924a2a62cd8ecfd3bdc86f47118cd53da7f9541d0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 16156 bytes

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