Malicious PDF — malware analysis report

Static analysis result for SHA-256 694b59d516b4cd2a…

MALICIOUS

PDF

101.9 KB Created: 2021-07-01 21:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 195c07209a03eafbf147f5da9be45b58 SHA-1: cae877119c0b1a25676d98362a6b69df0dfacbfa SHA-256: 694b59d516b4cd2ad8f56e636651ce94b8929a3ab8fada95833433b37e7f48d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 numerous links, many hosted on compromised WordPress sites, forming a link farm. These links likely serve as a lure to redirect users to malicious or phishing content, consistent with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

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://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/db27d96194a19cc42fd3ba802540b333/gugojoda.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e5fdd19f9---64242369007.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888e47964fb---8733340146.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/99211446770.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3bdfc115a5531cf3745aa7c50f0bf528/26283383654.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/wokemuvasorozipizase.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/78229528332.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/84213201763.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/be10acbc6391ee634487a6ac60d26423/24981753560.pdfIn PDF document text
    • https://peterdegendt.be/file/duxedorokudidogominulala.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/98710262984.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/a3dt5k9asvo71gekkj5n0ra935/30493663981.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892d174477f---40593631578.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/vamakexi.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f1fm97s4ifm7t77dtg72skb41/dasuluvedu.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/6c1cda80df0d51ed3930c3cbe53371a1/kusijeveso.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/61489092066.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/4e274ca876e434d220979599a38b48d7/benizidugefogefofiwuzu.pdfIn PDF document text
    • https://auto826.com/uploads/files/26580956599.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/7440863238.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/21742418694.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/nevobawug.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/sejidifuk.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d88c9769d87---tuzuvago.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/79c8a657473ed5b128d546748134d0d0/74337696056.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=word+of+righteousnessPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 2068 bytes
SHA-256: 641d6747a4719262c0ce1e4cadd2f0ce11877d241af20e986bad005de1980e4d
font_01_sfnt_off00011016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 19180 bytes
SHA-256: ae1fb815bf1c606648206d00e5cde91947d6d903651b2ff52ac838897faf833f
font_02_sfnt_off00014167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14167 10516 bytes
SHA-256: 934caf2fc055714f40d15fc8f34649c12b10f713165d74426adb95bfbbbe9d42
font_03_sfnt_off0001591b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1591B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001712c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1712C 16384 bytes
SHA-256: ced23655850fd0053dce3e573d042a70ee0c8a278b5dcd0cfce70d29e8e910b5