Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6d699fb5f1fbdc…

MALICIOUS

PDF

173.6 KB Created: 2021-06-29 04:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 475d5c68826041bee738113466f3be2e SHA-1: e06f79155995e973a23049765d62d13ede9d1632 SHA-256: 5a6d699fb5f1fbdcae10738d6d2fa806b70df12ad8dbdc5344ff3d02303a2530
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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 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://astro2sphere.com/admin/images/file/91838402417.pdf In PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fada6f80b---61263260707.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/6r7f9f8at531m42m2baf4ro0te/10453907966.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/57912217276.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/fa07b42ad532bd17df720c92eaaa7921/gogalavelokaz.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/f87b28f36b379f479c1ed1c9a338f5bf/61861817402.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/fuxuxudavofitoladaruravu.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/29086575349.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/litijoxevuxalad.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/3272cd7a33774ab69453aec73e4ce3ad/49631030636.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/955255a8f45531d81631b24634bcf1a7/36911506605.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/q34lte8p81euhikv14r1ijer84/32323975321.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7e184cb1b---80471557599.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/u7f5bthg1qmp7m6l1e8083higa/58513990572.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/45683808590.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210531210537.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/81430638253.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/b30aa11a81ad9cf771b745dd06fafe29/bovuforamipapifitas.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609b91e768577---wijuvamujum.pdfIn PDF document text
    • https://tmtteks.com/files/dowuvusiregivegalet.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608052d5a47b4---repixoside.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/kakem.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609453092c0a3---pevepevirixozuba.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/qp7s3v3ni5us7qlqn6hkivf5e4/sunepupewerus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=terry+johnson+playwrightPDF 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_off00024549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24549 10824 bytes
SHA-256: 720cd48086ee0a9c5b7f99c33a258a669a94a960100d4a7200cf1c3064bdaf09
font_01_sfnt_off00025e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25E48 19684 bytes
SHA-256: 6e3bcd0513393f7779599a2f6fd5841e4f8f01374390ac702ad3452edbef0633
font_02_sfnt_off000290cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x290CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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