Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3973eea7bb9029…

MALICIOUS

PDF

78.5 KB Created: 2021-09-10 09:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8ad8a9abd00fea9077c6c4bca19a9e5a SHA-1: 2699f0ef9bf61d83a76932228506bf507abf78de SHA-256: fa3973eea7bb902915fc38a259d191cf4542c72b77ee5f85426d97f5784ba514
104 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to distribute malicious files. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of multiple external URIs and a 'download button' heuristic indicates a lure to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://genia-groupe.fr/images/files/lerutakila.pdf In PDF document text
    • https://grupa-energia.pl/attachments/file/waxobinugupek.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/di3cc4cuoamhebcdb5fmsahucu/lujenisaxeludezogafinib.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/42629431943.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/vojawalati.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/75147049215.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/35191668118.pdfIn PDF document text
    • http://parfumland.sk/upl/mirazedos.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/tibaxomusonimif.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c3bf55524fefffe1fff3ac3f51eaced6/2548390072.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/72570594549.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/forixivajunojej.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/japifawufobuluretevibiwos.pdfIn PDF document text
    • http://sushi-belovo.ru/files/finujotelamalageta.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/186dbfca11bc3bd6bcd9402deb5fd0e6/kivimijapavikumo.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/bupixakenololovotuza.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/vumazemofodet.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381f3089935---22089488890.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161345ffab4e9f---28859542238.pdfIn PDF document text
    • https://jingchengs.com/jingchengs/ckfinder/files/20210906050537.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210902_172351.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/25517540414.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/pibekedukerebikotevi.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300423a2a7d---39344136701.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131497e93985---66837220105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=fast+and+furious+4+movies123PDF 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_off0000cb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 11036 bytes
SHA-256: 6cbb3717958a2227360e41feeee26b94844b7e55cb895209ec3e3c2734e80d10
font_02_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 18164 bytes
SHA-256: 7286ecfb2fd487c4f51454cd869a0b9c4805e39769b34e788783a9365e5d3ea2

Open this report in the interactive analyzer, or submit your own file for analysis.