Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60fbfbfa2f5191b…

MALICIOUS

PDF

84.1 KB Created: 2021-08-03 01:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cad93c01d4087260a64d677237ded8da SHA-1: 860e146667381b3ca230a2bfd2099a19594a7953 SHA-256: e60fbfbfa2f5191b54288f9d888b5d49d6c486255747d784bec31accf347be0a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Additionally, numerous URLs were extracted, many of which point to compromised WordPress sites or disposable hosting, forming a link farm likely intended to redirect users to malicious content. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://giant-nano.com/app/webroot/userfiles/files/64532378343.pdf In PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090a6e794a49---10046567266.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/zifolazikeleduwedowaw.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/pesub.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37ed59565d---xajirikos.pdfIn PDF document text
    • https://btegypt.com/file/zonogam.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2247c4fed5---keramunisun.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/pikebikijuwalepatuj.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb8940ec0f---fuliwaxesuluvidojawuveja.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/8249705048.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/6d45909c9d0b63dd1ecdf630a00edef7/66530597536.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/9irfbfl4t1lmg2lagpl5tdcdf3/vonozivewejotefegokajo.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/43d9b7eeda6f56b1dedddf90305cb13d/xelosetozimag.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/25fa595b8f6602894c567dc3e5c51640/90809320545.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/57169245730.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/zozigofek.pdfIn PDF document text
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/bozivama.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/ledixoj.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1608405429a2c7---95932196071.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160878c3288849---jinotupugori.pdfIn PDF document text
    • https://discoverthesky.it/file/85661117368.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/kinofid.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/wiluro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=henry+fayol+teoria+de+la+administracion+pdfPDF 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_off0000e3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D7 17520 bytes
SHA-256: db44476d451b010c9dcfc80238b113ebb0d0c8d64d27d63e70816324f9923dbe
font_01_sfnt_off0001101c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12833 10888 bytes
SHA-256: 3a03f184b66c26820ce839047c9c16a3011ef8df36845bc51742ed280b4577d7

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