Malicious PDF — malware analysis report

Static analysis result for SHA-256 79679ef225f942a5…

MALICIOUS

PDF

87.2 KB Created: 2021-07-06 01:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b0bd6802a311499c09418865de232105 SHA-1: 1a72d7f5f3cc43c13e7cbba21c993503a9e1b273 SHA-256: 79679ef225f942a543dbcab4540b9aa0adf364c9b324213e9672a1d5ffe88325
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to bypass security scans. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://philabc.ru/uplcv?utm_term=wwe2k20+file+for+ppsspp PDF link annotation
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/c0a3fb249c9350de6bd2cfa65cb8d38f/90258800122.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/49474997a50f8f659c45479147587668/4573411567.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cfc5ee502---23603613492.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/tusogezekuxexepedelajodix.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/vulenubujesepif.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b5bd313ce---97107563022.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/wupajinigozipefunufepabak.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/fataxavalakijaga.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b877eee9d5e---81944312563.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf98971b1---58970189859.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/xopejadixiwujumuxilozomi.pdfIn PDF document text
    • https://dietacud.eu/upload/file/87670903838.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609c203c9b9e0---97815851971.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/s2b2il3s7oav7hu7dr7439vclt/kinefedomadojujesanira.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160866f1396eb4---puvekazimavejepotap.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/gefudojaluwune.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094079f285be---womegatilobatonulepananux.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607213137131a---zutilumasad.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e0a0e1ca5---92046605306.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/1t636t8gb3f7fnkrcri6vg11g6/buvavidagavem.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071295fd33b7---4790746455.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82158442948.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1d397ce0---jukazudapufe.pdfIn PDF document text
    • http://championsview.net/userimages/266312857.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/74000334936.pdfIn 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://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_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 17388 bytes
SHA-256: 289f86796f5cd07222e18e0910a96a0a05293c71173aeb1aca2f5d7cb09ab72b
font_01_sfnt_off00011fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD1 10400 bytes
SHA-256: 34d869a98b2eb9fbc8cd4fd31f6e4ffa8baf0530333f086c697adea3b3f5da8a
font_02_sfnt_off00013790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13790 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1