Malicious PDF — malware analysis report

Static analysis result for SHA-256 a592d96405277020…

MALICIOUS

PDF

82.1 KB Created: 2021-09-05 13:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 46391122d279b0fbdac7453abce5c80e SHA-1: 5525995841af20d8b19e9f2a5d2083ddbab68f96 SHA-256: a592d964052770201cef280d5d28ff0d7c89a5afa2045a2aa641899e720232e3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier also assigned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085028a8d353---finisa.pdf In PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/5af84860779ae0a70f0529496fec11af/magebonolevije.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/65340307834.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/p2cji2mv4uk8sb4fjctofl69k8/bulugogagawajerogifezugo.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607902d9edebb---48879299814.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/jezereg.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/19633554723.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/zukaturovawebevux.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/59581572269.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c546dcdd104---6985781577.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/94029279788.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/9911a44ea11bfd7dbf4fb4adf1e6d035/domolura.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fcf4dfd2c---pesojakixupufanijekesazi.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160746aedb92d3---83781539745.pdfIn PDF document text
    • http://hasyo.net/files/file/bubutosiramabawi.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/37312963643.pdfIn PDF document text
    • http://tapestry.cz/images/file/files/suropitobabek.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/22147444614.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/80059309204.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/860001879ffc894d9a7d7069ed132e69/39396866219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=2019+planner+printable+free+pdfPDF 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_off0000ddf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF6 10708 bytes
SHA-256: 276609466dc35d2855298a207df9302c4137328492147bcee26524b689a97bcd
font_01_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E91 17176 bytes
SHA-256: 484d2d4737d54c59bfcaad866e2324615e922f7589a1fa1eb4bd0879ab54f823