Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7617e70e452912…

MALICIOUS

PDF

74.0 KB Created: 2021-09-05 19:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e1358cc34f51e223037bec6b021895c SHA-1: c9bd2f6314d6d7208126709dd5e997247e3b5acd SHA-256: fd7617e70e4529120cd3d0e6685375f1aaa8e0102536c3888769316d2f9aa8db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The file functions as a link farm, with numerous embedded URLs pointing to compromised websites, many of which are WordPress installations. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://spreewaldatelier.de/img/editor/file/72618110260.pdf In PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/0a81c3f36a331dbbe725bb7cacd186ce/60246537321.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f354a411---farawamafusazimajagotom.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/96881865087.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/n173t24vqmmgs9cqt26sav5h8g/43952329211.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/zudiwuzavofilozopomu.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210826003110.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c09d3da4a20---60637949513.pdfIn PDF document text
    • http://gyobel.itpublic/file/lesenapizinipuvirefu.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/lomebalejoji.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/47b379ad401285d7d75175d40d5ba72b/1763127234.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/laxunodijeronijexewizus.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/54817733667.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/637850ee4ce1b25e30b2b1c2fa9c2fa9/84184904541.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/jufovozawejoduzanaza.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/xapikevivoxokaxatewifezi.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ccfe11b204853afe68690c765545de20/39675158573.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/429506955.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/dabejemowiva.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/2077916539.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/63496903741.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/81777676951.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a478b5b50b9fdf4cca02ad8d9580976d/betixowi.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ce448f9cc---72099674069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=biohacking+insomnia+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_off0000c092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC092 16104 bytes
SHA-256: a1060f0db1f0f6a72fa0e1e90fa24ba9463f6dc56d5794cddbb6c09072961d06
font_01_sfnt_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 10836 bytes
SHA-256: 3583276ec94b483bf651b4be1dd04bfd2a928292af05d238ae443a462ab77527
font_02_sfnt_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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