Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5c60b027342c36…

MALICIOUS

PDF

92.7 KB Created: 2021-08-03 09:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 627d4815d5ea0f46d080d49242051197 SHA-1: 8ea4edca7b495e17ebbfa4129e7a41f274cdc307 SHA-256: bb5c60b027342c3671b0e504304c1f271a1a342bca4057a2062918f30d577a01
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to distribute malicious content. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update, a common phishing tactic. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721e0498ee0---80572801220.pdf In PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab00828ca0d---keperitufeno.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/minudopodujigages.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/3f0c6b16686729ab4d1dfa6db0008e40/83905202309.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/70354592190.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/rofovepex.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4d81aa058---76251891426.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210702062744.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/7986052783.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-7/20210507125812301119.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc52f543ba---98786160814.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609758c388955---15248483068.pdfIn PDF document text
    • http://groupkaishan.com/d/files/mesuwuvofo.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/10193522701.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/84031088725.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/sezetolusa.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/f26474dfea2f4db3acda8dbc685c573a/kimiwa.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c59f23aa03a---65764098854.pdfIn PDF document text
    • https://ivanamihic.com//files/rarasagawodune.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/53931393613.pdfIn PDF document text
    • http://amandamaitland.com/images/file/rodibevinavawobowixa.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/21375720004.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce3836159---62306850359.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/9f357490d2c087abd2678ea88e768f76/vidowajofo.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/2150387428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=can+you+play+minecraft+on+chromebook+2020PDF 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_off00010031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10031 19168 bytes
SHA-256: 62505e477f4f9addc6e810f6c451dc4cecac403784bcf255162b58be0ee1c645
font_01_sfnt_off00013112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13112 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14929 11296 bytes
SHA-256: 0fee043298a114dafe37248066c386418fc01e90f1770c595d5a7cd1697adf74

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