Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fa3eafc8b6e2cf…

MALICIOUS

PDF

82.4 KB Created: 2021-07-29 21:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c692df598ba7721333c5a7eba8ce0f46 SHA-1: 8a2cad5b45dd25291838cb9d0a95bc3b9d21ef0e SHA-256: 96fa3eafc8b6e2cf3987476d7657a0773addae26f7b3aeb207c4ca695e40c3fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, identified as a link farm on disposable hosting. ClamAV detected this file as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3bd6da9bc---2214428690.pdf In PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/49kcs0blhora7vloqcr6n86oq6/lakofepoxupeda.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/180a5172ebb6b3c0a44b75a5ac685dd0/8826677197.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/e7b089ed2553d6f75e996fe6fc9aa590/latovuwofegulekigok.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/zafab.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d3e8958d7---tujemijuvisije.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/rogofajazekokusadebixobu.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/aaee360f5e3b3f02a4086fa7fe2efc25/66597722715.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/85601918850.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/tusumopizewozoredini.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072893dc70db---98113378552.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/77636890565.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/obd14oqjf2qm9ml0jiiv3mkurd/naligoletifoverujagiwut.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed922636c4e---7199723949.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/wakesatobanugifutopugupi.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/midutazek.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/17d8e8ea170e65b01fdcd7a37aa1161b/25528498010.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/25377305945.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/abfe44fde99890dedaa98d43a389ced0/78283020147.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/25545f9a4c7c5b5c1b388e43c37b9747/vimamera.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/43985192579.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/3852288357.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3349b0427e085d0a55fd3dfdc514d1ff/14429878740.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/eae2571343d38f00f68cdd75e1bc3df4/sudiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=o+principe+do+egito+filme+completo+em+portugues+portugalPDF 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_off0000d84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 19428 bytes
SHA-256: 3dc3a92254b290695d4661c4548d299f63b2930095fe88fb86c72e4cbead0a5f
font_01_sfnt_off000107b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCE 11088 bytes
SHA-256: 3c5897b9b024c536e2696a0ad225c6b5d8f5b366a49d6c0bf1f1916ddef0acae