Malicious PDF — malware analysis report

Static analysis result for SHA-256 817227d622585ac5…

MALICIOUS

PDF

83.6 KB Created: 2021-07-02 09:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: db788c52351865a07590198d9c155b24 SHA-1: ebb171df568bb25af6395eb1d4aa1d0a6841f3c7 SHA-256: 817227d622585ac5b85a48bfb0f2bfe1343ea2120fb0b70fe539a14d47193020
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The primary purpose appears to be directing users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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 https://huntic.ru/uplcv?utm_term=what+is+pass+no+pass PDF link annotation
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f44b93eb35b0890a1452654a5878d50/38908435267.pdfIn PDF document text
    • http://szwygs.com/upload/sujijununuxas.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/da1f1f95df9dea2dcc7ec3093fc868b1/13575801661.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ec8a6379c---87130961017.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/96281168073.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/gatafax.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d7f9280b3---nikiguwuremiwifuge.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/fa8cdef75204d2eb122deb201e7764db/vekegugofirefeg.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a1fbb1af9---dazotatogixukexa.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c477674eb---zusofuvoxiwejarevegokexu.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a39e7a2b714---44471079068.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aba08c9eecd---fovipug.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098175538981---78633861089.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/76209355298.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/mezisuzijaxeliwoj.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160994bc583a98---69771970795.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16083287f2624a---xogatadanakigabade.pdfIn PDF document text
    • https://armandofalconi.net/userfiles/file/89047330055.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/64981846557.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210618_1B3A7D40D0FC4E55.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/5emdrg4u0e558afuvfqjm29akp/pimuduvos.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/xudofusumosunugudolowiw.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/82h27ofjk80c0ftn0u2megnpo7/morededufil.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_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 10064 bytes
SHA-256: 94b8ea0ba14a856d7014f68b18dcba65bff05b83ae19b7a386641381be558f7c
font_01_sfnt_off0000fe5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001166c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166C 16580 bytes
SHA-256: 5a825ccc6e9525bbcb3c017e83bff44d554442f10470154e4f59a34badc75638

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