Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f33b8e4b181956…

MALICIOUS

PDF

83.3 KB Created: 2021-08-05 02:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 47b029cf1c9f123490936c4e65c0fb8f SHA-1: 51cdafb59e5ade47e59c17637bb5cda60a006bbb SHA-256: 67f33b8e4b1819566b2bd88e0dc1ce6c5dec66e233c41d8e2f337588e74791ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://laborke.ru/uplcv?utm_term=typescript+tutorial+pdf+download PDF link annotation
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/69fa3c1a6643f1f47a94ffdf58304807/mivevixajezaxavuwasiz.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/sotuduzusika.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160825815002ae---nepox.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736a9556b9e---gudepesuk.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/ruwitapegamoxi.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16078a072bbae9---ketusalekifevugabukuzinu.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/22350889420.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210531_EAEEF5A61367881E.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b202d74e1b2---67932944884.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/kofemaviseleximolina.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/87046075186.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/wekutoji.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/60d90de2f495f8f2ccfefa093758423f/furebok.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///bipega.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/23484074136.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/j6l35njm1n7u82d4hm0fd6msds/26904029712.pdfIn PDF document text
    • http://inse.us/uploads/images//files/muroxovovesubexag.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/30807327026.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/8a81b64d97ecb3690fcf08932742fa31/rubolex.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744805b09fd---migezopujosalufotolol.pdfIn PDF document text
    • https://promtong.com/promtong/temp/file/39987965488.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/14610739149.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/pigowowufiwuxokabu.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8gnfsbi1hplp0nhe46565d7qj1/xozibesosa.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/wamono.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86A 18380 bytes
SHA-256: b447b1396399764b82fd9e696f81c7ad4e6e2fe5e9c2a86cccdbb78da8015422
font_01_sfnt_off0000f751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF751 16236 bytes
SHA-256: 9f9c9255c0426c77c5b13ef22f4242f4f7095bfd8ba808a20cf1712cd58ffb40
font_02_sfnt_off00010cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEC 10876 bytes
SHA-256: 5782b85a76cf100bfdc9d4dfefc17f08bbf76e82eebe66ab5ff2c78948975a57
font_03_sfnt_off00012647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12647 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.