Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce6f20a42de2648…

MALICIOUS

PDF

79.5 KB Created: 2021-09-04 23:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 688c6fefecb7681431ce2184cdbc4f78 SHA-1: 64d477ceaf853ca32f830da026072bcf021336b7 SHA-256: 2ce6f20a42de2648b5d93450e98767f5260d2ddadd488106d497bfebf728d55c
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It functions as a link farm, directing users to numerous compromised WordPress sites and other disposable hosting domains. The embedded URLs suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pixomot.ru/uplcv?utm_term=long+division+worksheets+with+graph+paper PDF link annotation
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/f1340328c49bc8cb4b990414a4d9baa0/50700920616.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d30de93cb---25637330714.pdfIn PDF document text
    • https://groupunsur4.com/contents/files/womonepa.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f057c7add.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef8d5f1500---4423620704.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/84853a1129f96a1401cfd79605a4d77b/jilepupiserinemad.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/21800419884.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/9962162520.pdfIn PDF document text
    • https://bdcomunicazione.it/file/nenemesed.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/jenomavosonororox.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/fugolikozaviwofexa.pdfIn PDF document text
    • http://leeclinic.kr/userData/board/file/mepawodukebulegato.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81b9718356---nusul.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/milanumix.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/86993822572.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/fk0manus2dp44g195fr8tfc63p/16588361704.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b224dbf53---9291501358.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/jofus.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae7a47f4e3---lilomajigabo.pdfIn PDF document text
    • https://mahae.hu/files/files/redowiminesetes.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0ce5015548c460d67dd62a79d996ba22/13704371775.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/vie4p7esacp063vocno4ms69b8/kibujafogizegupedat.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/97323500428.pdfIn PDF document text
    • 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_off0000d3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 10828 bytes
SHA-256: a085d7ad0608d9929f25d1048fa16e31a2850857f5fb52a9342172ff9c68d624
font_02_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 16860 bytes
SHA-256: 41a7a20db030a30dcdb3ed6567306ceb85d7d1d96100dad2fea4e5775322f388

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