Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabbbcc9418d094c…

MALICIOUS

PDF

75.6 KB Created: 2021-09-07 02:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bdffac3ea1ae8968f9247c8d88db7df9 SHA-1: 7e45d4d781582b1f2fcce7ee38fe20636f5e785d SHA-256: dabbbcc9418d094cab4f8782ae1770fce6b3c3a181790c4267b17716369ba43d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous compromised WordPress sites, disguised as a download for a strategy guide. The ML classifier strongly indicates maliciousness, and the presence of multiple external URIs suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8c8a0c58c---dodux.pdf In PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161002ac8afbfc---nizuvogadilagelodinixiri.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/77030304868.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/ei8ljvbmmfvdohcc6d9j3tlkkr/zujisanoxuporuvonidef.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608aae928fb92---37470445718.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/71d374adac38606a249d5a51b5c38614/68948418606.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/319f814b26ee419c4ea526895d11e6f8/40113451270.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f7ce0e7de---52419318147.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/2111800210.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/a5d90bc9429b0d5c96ccc4e70c250ce8/xudivukaloxituvub.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/4ae84eaa300e478ec2cf5b6e01444049/tewawumemevolakora.pdfIn PDF document text
    • http://adveotec.com/img/file/wifijobewazev.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/vogegukagiko.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/bopolipazajosipiwerakisa.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/d4p1thbihdtqq5b7156vt3q5n3/96287826648.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/416c84ea9d94e265bfbca121c019a5ab/53446558387.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160836e7f7a701---gelosagexapasilukakaves.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80490289954.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/26124571842.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/laxagosug.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/batedezabixezijevixewob.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/2cb6c2803ecdf439c5739ffecd53cfaa/55637147709.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/radar.pdfIn PDF document text
    • https://unaizahic.com/Files/files/dugowigojo.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/judasofulevudumobol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=dragon+age+inquisition+strategy+guide+pdf+free+downloadPDF 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_off0000c18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18A 17200 bytes
SHA-256: 80250fc34e9ffe1c5757bec937b62008cbc02d653123eb46ce63a93fb5028e92
font_01_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 11120 bytes
SHA-256: 79fc6416b1fb8fed1a0b8c2e811904988d012227c05aa58761fe4294248b7060
font_02_sfnt_off000107b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1