Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f6c7497afe345a…

MALICIOUS

PDF

142.9 KB Created: 2021-09-04 23:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 172c2bd4909564ce7fc495d7b7bbec33 SHA-1: cec8c9eaa1c062d6a98c70c75c9e23f60a88a1b6 SHA-256: b6f6c7497afe345aee48de79ea71ca911e2e84fed43c241994bd4bfbf28eddb3
124 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV, indicating it likely contains a phishing or trojan payload. The document functions as a link farm, directing users to multiple compromised websites, some of which are hosted on disposable domains or utilize WordPress upload vulnerabilities. The embedded URLs suggest an attempt to redirect users to malicious content or download further stages of an attack.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4244

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://medvor.ru/uplcv?utm_term=hoard+of+the+dragon+queen+episode+4+pdf PDF link annotation
    • http://holyfamilycyo.org/clients/37654/File/furis.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094519ea8e96---1227905872.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/kevoneris.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4801b1f209.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/wazokuzesifexoxumib.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/29032259805.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/40043032582.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9f0614582158ae053c524667106610ab/domenubal.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd67aec49d---53274991989.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/sulazeduj.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/7fb8c384b84e748f6b17538357741141/govepubub.pdfIn PDF document text
    • http://thueotodn.com/uploads/image/files/wubaxemozilogog.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/mesedijunitadotuwaloni.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/nufawon.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/kowotewebesatig.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2414b5527f---22853552593.pdfIn PDF document text
    • http://aps-mes.com/files/file/wipus.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/xojajafixe.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/fe4993a3b8d9b63b739868ba5c7b7d3a/48410797114.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/75097624373.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/kusipekapalenodakafure.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/79088890378.pdfIn 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_off0001da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA79 11044 bytes
SHA-256: 66583b9feaa5f1fc649da3e5494882ed7e60b9282751d1a8b7cae53e1ad50181
font_01_sfnt_off0001f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F397 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00020ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20BA9 21012 bytes
SHA-256: 2946f1bcf95e3f988d8554e6dce1e15c8a77f17ab209839092031901aff7564b

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