Malicious PDF — malware analysis report

Static analysis result for SHA-256 608dce8015084896…

MALICIOUS

PDF

72.2 KB Created: 2021-06-19 13:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bdde83901c831994d49d981aaef8dcf5 SHA-1: d1192ca5c7c940a865b01ccd16f773ddae7bc64e SHA-256: 608dce8015084896d5a49e78f4d944ebdd0a90580bbad906f2f0043c4b446191
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a lure for a 'biodata format for marriage' and includes numerous links to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=biodata+format+for+marriage+in+word+format+free+download+doc PDF link annotation
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49b186cb0f---67483283720.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/kamomufotafizovugodanek.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/81783246642.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/nqa9o3hfhg3vu8ecb83bgr9pk5/rivenidoxeriwixedesudefe.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/9ruku7rmhuqkn2v30mvfaq1sfs/pujoteduligis.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/setaku.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/b45d445fe5614e6dbf4e8f720e629fc0/46042165872.pdfIn PDF document text
    • https://zahnersatz.pl/userfiles/files/83019386339.pdfIn PDF document text
    • https://fallsplat.se/file/fojovosifam.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/20932dd7ac55e5e078ed95adb1171574/famibuxivizojedoxuzogim.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/27481857471.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777bfcd59bc---xojarubezozemoxubulotafop.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/2768673d77030b40ddbe2e05f3e68571/14266427240.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16078bbc25e5a2---2892991320.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/90907121490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 5304 bytes
SHA-256: 5d725b0e5e5717ce7577567bd9f8d36e78576d4ba9cd7192c22c673a20c60cbc
font_01_sfnt_off0000eed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 10672 bytes
SHA-256: ba00f3ba2d96a991ee48c671d3d5931b915161759af6f032102fc30e657543da