Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe187f7fc6bece1c…

MALICIOUS

PDF

97.9 KB Created: 2021-07-21 10:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d7398a9bbc2ea71108d1a2a83fadae6 SHA-1: 4a10f9cacbbe2fe29c58a7d949edf9bfa9a6738a SHA-256: fe187f7fc6bece1c8abd48a244f230be81b06dd5463c01a3c2f2562bb6c88738
96 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier strongly indicates maliciousness, and the heuristic firings suggest this PDF is designed as a link farm to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • 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://jgbt.us/pds/userfiles/files/39920492102.pdf In PDF document text
    • http://101eyewear.com/luutru/files/jawaburasinenezibegip.pdfIn PDF document text
    • https://purmoradiatoriai.lt/images/files/69352788452.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4fbd7863e---dewupupibo.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210618082150.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/91436654002.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/e3884cc8d7505029094b7a35fb7c373b/vukajefetupolopetaxoj.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/99795387807.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/sunorimikivagu.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210629045040.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/newirusaredifej.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c0daa144a15---xilifatapilajijizenofepu.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/22621156677.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/papelizupeza.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/38823230815.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/tvs9u2rotcfuhi6ugk983a56a0/situxexuwu.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9f4b2f7678c060f3f2584e5667fb28e3/87196385940.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/gojawofajoretato.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/kilopemusapevot.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16088df6adb4ab---potewabopefidefuzojegi.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/26698319520.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/3abaeaa995f959e4c949b825d9289686/zerifagisi.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/gr5vudcik7suc40s3i8nnjor2b/33677840184.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/kuganinupodurebeni.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6dce3925bd---6885219506.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/54719782689.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=low+etco2+during+anesthesiaPDF 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_off000118bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BB 18388 bytes
SHA-256: 79f01089f017d267654ebe2ab18459ff7b2c38aae1073b4d610ec3bb23a1988f
font_01_sfnt_off0001495d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495D 10868 bytes
SHA-256: 4bda73a736f197e3f1ae9677b2581cfe87751bef5ac1d62bc64f1e00ac4f94d8
font_02_sfnt_off0001625b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1625B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1