Malicious PDF — malware analysis report

Static analysis result for SHA-256 705a645ce957923c…

MALICIOUS

PDF

142.6 KB Created: 2021-06-24 12:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6575a24d1a92b860b7a69679bccc183c SHA-1: c7baf6a88d40ac741f3a1c86645bd0569ef02896 SHA-256: 705a645ce957923c01073b4f80edd33c93904c71ce74298acd860f8cad437c2c
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various websites hosted on compromised CMS upload storage and disposable hosting, disguised with a lure related to 'Black Butler chapter 96.5'. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest it's designed to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://consulcongress.it/uploads/assets/file/tamufexujaba.pdf In PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a151b3690c0---14068279258.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc955bafd---4049377526.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/22583016819.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/duxabadomizi.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1dae7976d---dabixegufewotexe.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/pafagotimisinedirigupoga.pdfIn PDF document text
    • https://mmszke.hu/files/file/sorepoka.pdfIn PDF document text
    • http://sooclose.eu/upload/File/55084170157.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/94529441409e39dcbc13ac17c9f5a67f/82089111351.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/b708ccfd02e81d96cbacc8c3d4be6df4/41625539149.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd69c89733---41395367939.pdfIn PDF document text
    • https://noddy.nu/images/file/wadorolen.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b60c2c4d0c---44967743883.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160bbadaf4197f---keludabi.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/47972fc03bfd3c498b1f327413d82891/tavepufosevesezunoboxo.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a013b9866e5---45234653733.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/9873f6d3773ff6db214f416652e4b3f4/rupitezumalekig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=black+butler+chapter+96.5PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE6 61468 bytes
SHA-256: 8f9a4237b61daa3c4efcdbbeec42b1523714c674ad556e97680337d4b9265a64
font_01_sfnt_off0001f520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F520 5564 bytes
SHA-256: dd9f9f41dc65f6d70c0f4d971cb7222da77b74953cdd722a7e9c803e745fd18a
font_02_sfnt_off00020806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20806 11072 bytes
SHA-256: f494315ab52fc0335c040fe9bbf52de3bc046b8fbbbcd0b2bfe58c48d736513f

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