Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80beecaeb6d75bb…

MALICIOUS

PDF

85.2 KB Created: 2021-09-01 03:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 02a7829a143115b59896f73700b312c2 SHA-1: 0c1163117b3e14459c301093a7c6bd17c14930b3 SHA-256: a80beecaeb6d75bb8c854fd132de936fd43d24fc04ff5b90d03ce1869d17f5de
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e2093296---3027699790.pdf In PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/77075151016.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/uaqqfrrn46rb2cieatm82bl2g2/41636106256.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/9198936808.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/5b7a9e862257a23bce3c733bd1774b1c/28384832554.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/kerizuvugo.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/25011769079.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/88cg0no5diudiovpef8n9suoug/dofafadabosamofa.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/754162460.pdfIn PDF document text
    • http://magiepourenfants.com/images/mediamanager/file/xakanelakelubavewamog.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cc0f2698f---14650411559.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/56751863436.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/39604135758.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c225aa35fbbc4e4b3acc42e0f9f6fb75/befonijufuxulomerefeguz.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/defolulubowogom.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/aab0a5d6237b16c23118cc8038d55f34/libofaguwuzimigigibuzuwi.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf3f657143---81273368667.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/66205712809.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/88152425098.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/88adcf982db4b7ed8d1d7e9fe26312cf/suzufijer.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/81588471285.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/wutena.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/98574239990.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/59231074631.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/67189455330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=types+of+asteroidsPDF 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_off0000ea3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3F 10420 bytes
SHA-256: b1224d5208c39dc03d63f736228a4e61dbccdb5e8513a6d75c741d73bc4025ce
font_01_sfnt_off0001020c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1E 17308 bytes
SHA-256: 9f8ba83931b7eb6a1b7057e1a7ff254c0bb6b4502494ce683217544c2c2b61f2

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