Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a2a61810ed0517…

MALICIOUS

PDF

81.6 KB Created: 2021-09-02 06:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7d20b5f0cf335af99ebcc1b5927eea77 SHA-1: 8a0be593330cc91fc3344237275ec1129888bfa1 SHA-256: d1a2a61810ed05177c9d3094ec41d82930d3aa91863f22bb646162b1d3d166fb
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The primary purpose appears to be facilitating access to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • 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://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d11122cd01---benaxe.pdf In PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/genimamokaro.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/49fb0805569edcc1bf3d66cc32c4f3db/89226862956.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/b2f124d87c598a96432b0ef88497b2bf/71963758525.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/fg1dud1lelog500006pf6pg4c5/28179839093.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/8fcfd99ee85015907f576cf3a0525583/45398361720.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/likalewojuzulozedogev.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/7350be60dfbc5d65196ab2e316ddb4ab/teziduniketozake.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce69c49014f---wofojigokomutoxerejozono.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/25990269051.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d5491ffb7---tarenipavanitabokewesike.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f77b5b2bf52---pafuduparoz.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/17951994997.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987a45a3a7b---definuwupiv.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609858878466a---jizova.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/digarovalujowijoveze.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/708410237.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/64cd04fb9aedb9b73e823f72025beed0/mokavabomejudekigidigawi.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/virimixebokaxixamowaf.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/968661388.pdfIn PDF document text
    • https://fishboat.hr/files/muvukelobim.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/db71a661d9e6e064b651472e19732dbf/kokakojonogalegodural.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=meaning+of+castration+in+englishPDF 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_off0000cabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABD 10608 bytes
SHA-256: 6504e6b1ac4f78ef95f33127bc5ecd443d8c7a71317071de8f297640a0ee7635
font_01_sfnt_off0000e2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFE 23576 bytes
SHA-256: d63e2799f7829795ef7f3b26064df0b54840b24ef4a21f008d5047d99bd32df3

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