Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bf7fa9ff6ceeae…

MALICIOUS

PDF

92.6 KB Created: 2021-06-28 01:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2869e8f0156a0db4bc3dc464ab24e634 SHA-1: e5191eaf4a7935ab9e076795aaf8f071b50d0ddc SHA-256: 65bf7fa9ff6ceeae419549e8714e0cd70ffe8a68f40a4acef38b9df2fe30a9c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://jamurgoreng.net/contents//files/duzepodufexubazumomuzesu.pdf In PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/28204895933.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/13608e2cd0a4b9b1269a9654dc1ee296/tupirodobi.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/q0c3m4kp7vc0dekpk7ckj164p2/32431112460.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/40b4dc8d7303b89680c9138656e29885/7660625954.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/5839a869aff952390ec1213cf0691111/95735957111.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/4725431925.pdfIn PDF document text
    • https://xigmatek.com/upload/files/purijepakipa.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075b33c511b0---1695729117.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/96721437678.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/fesojagekepado.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/qnqjb6ci7dsfboahm1083oheei/bisudasubiraduwa.pdfIn PDF document text
    • http://seamacros.com/upload/file/panojaj.pdfIn PDF document text
    • https://schmitz.cz/res/file/topagukob.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/boveganapeson.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/06-22-13-30-11-91.pdfIn PDF document text
    • http://rosycaffe.com/file/mepomixiwevobofegagudej.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/77f1af32e85cc521053e68c4c30a6b21/41183830902.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/7l3sdackdo31j2rpi9c495fam0/giponerajorijij.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbe7ac5858---18489379852.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1606d821ac55ba---11635031873.pdfIn PDF document text
    • http://veribase.com/E/file/62244965093.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/tdhcs3s98tuukfh53vouicng71/61427935766.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b117c5da1c2---62559046814.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/99648802271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=is+ethanol+more+polar+than+acetonePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 10496 bytes
SHA-256: ecafa2f29c7998e13ab56fb4b8500c7125b6f7800eac3975a365ceb7ad37bce4
font_01_sfnt_off00010567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10567 17892 bytes
SHA-256: 5877d05c6e68446f367fab6855638af3c98b0266ba1d22f03b6961916ba51bbd
font_02_sfnt_off000134ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134AB 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_03_sfnt_off00014a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1