Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacb88e6712c3dc9…

MALICIOUS

PDF

85.1 KB Created: 2021-08-31 11:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 00a1586bbf70ed699bdb6322597b84ea SHA-1: 910c2fa665471ab764d13fa15e48b0e011a25f1e SHA-256: eacb88e6712c3dc9671ac61602f413d36d733821ae3a2958c4003a74d45acee7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which are hosted on disposable domains or appear to be compromised CMS uploads. This behavior is characteristic of phishing or malware distribution campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://elma1.ru/!upload/files/34423107164.pdf In PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/4976fdda1b4238531c45f4407af11fed/90381924239.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cc090acea---gezexuwib.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3030041b2---fonamuwab.pdfIn PDF document text
    • http://abwva.com/uploads/files/xeguvegediji.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160fe1b558fbe3---29137536173.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/29420977730.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/rananizuzav.pdfIn PDF document text
    • http://industra.sk/userfiles/file/77844472631.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/somaxoxaxe.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0fe4c24ca---debeji.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/39750247395.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/81552874024.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/41528109954.pdfIn PDF document text
    • https://cooperspick.com/files/26942754296.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7954da8a0b---88224813484.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/7j5ucbj2mos79kv58s60qfa4lm/dorobozajimazaxalab.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/150b57566c6d6c1cddd557d53b0d95ce/foxuwezilofe.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c86be978019---1665258565.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/jaxumerarogopujuzakufev.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/tajor.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3884aab234---panonixuvabuvaforavowag.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5eb4fb3744---8547373565.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/49067000421.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/xezofenojimonorawasutameb.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/wazasuvimifavumen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=madonna+as+a+childPDF 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_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 10132 bytes
SHA-256: f1fe8c9450d9c77baa7ef0f4731c9ba7acda2bbbb789301ef410bb9c8d56721d
font_01_sfnt_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D3 19160 bytes
SHA-256: ef2a241fb6954e41426091e79a173335862b7b2201bfa8253154ff277fff1048

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