Malicious PDF — malware analysis report

Static analysis result for SHA-256 658edd3301f393c5…

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 02:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bc55773fe4395cb3f0b8bdc4d28004d0 SHA-1: 31b4384977a971ad5a152b7e6ed27e45f27161c8 SHA-256: 658edd3301f393c5ee365f7f32022af9b0ed7495c528740ca178bf1a2f22e1d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs hosted on various domains supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/df8c202811dd860a51475b76d7f067b4/93958067234.pdf In PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/ronuratadejowurem.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/winataditatelutukezosiri.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/felizoxutapepufilipuvovi.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/97558993638.pdfIn PDF document text
    • http://nasledie-sluck.by/var/upload/file/samerarivifalavutitifibal.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7e402372f---7903206236.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2f492e254---gimotusesuzigakedikit.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45076ad95b---13589373874.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/74785082438.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ec022087d---55679804027.pdfIn PDF document text
    • https://fond.ru/userfiles/file/316502778.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081504bf1b8d---korowaredobovopo.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/e3emn096k23th18abe6f3e35r6/kulokakulokemo.pdfIn PDF document text
    • https://thietbixanh.net/uploads/files/60802687168.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/20131815705.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/36780094931.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/88765767906.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d858774506---88591914585.pdfIn PDF document text
    • https://thepainter.asia/upload/files/ninonipisibedinuta.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/38169508354.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/vomamul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=we+are+made+in+his+imagePDF 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_off0000e0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A8 17596 bytes
SHA-256: d537acbb75414e1906605f8e2ff956dd86bceb466c80ceaad4c751c7985195dd
font_01_sfnt_off00010e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E89 10424 bytes
SHA-256: 1834f1a7310784353c4568e77a02605a9af3919d267187c26c0f9e5e5c9709a7
font_02_sfnt_off000125a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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