Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f414a4ef6a8a5b…

MALICIOUS

PDF

943.1 KB Created: 2021-06-18 06:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4631d2e00a95b6b385f6e738f7cee1dd SHA-1: d7a7ae7a093ffee0d590287341f6e85d73b91741 SHA-256: 86f414a4ef6a8a5b5b0c2a2692599f849c0973488b29db8856eb5174537497e8
136 Risk Score

Malware Insights

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

The PDF contains links to external URLs, including one that appears to be a compromised WordPress upload directory, suggesting it's designed to host and distribute malicious files. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The document body's content, though garbled, includes keywords related to a movie, likely a lure to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier clean score 0.1872

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://crewmak.ru/uplcv?utm_term=tiger+galli+kannada+movie+full+movie PDF link annotation
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/84439258504.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/tibomojapujebud.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/eqhpigkaf9fstl3u6a5vhoqb02/29641050093.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/8cc4080381f12535abee2f7ac78f3636/torebilujizeguzofalukali.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/megebomabiwepokasolipal.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075498d0fae1---53739737274.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083d55ba0faa---56716492652.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/munagaxigidesukiverotogu.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/77344475977.pdfIn PDF document text
    • http://proxima-design.cz/files/file/55879149145.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094741a80265---xumozugipanugi.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/3549575943.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/gusadapo.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099cf7f2d0dc---53590825835.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607491a996f5b---33787321642.pdfIn PDF document text
    • http://bjallstar.com/upload/file/goluvikusisusi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000e8507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8507 5120 bytes
SHA-256: 6e42138765ffa8b14bb0c8e21a4b389d52e8965dbb8a4df083a949ef4fda35b5
font_01_sfnt_off000e9678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9678 10672 bytes
SHA-256: 1f0699f8e99694111894d9d22ad296207418ec8aad4fd0e6db8356920865a020

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