Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4efe900070a8150…

MALICIOUS

PDF

79.1 KB Created: 2021-09-05 06:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9e34272e53515117f95a1bf06d31e7e6 SHA-1: 2a6ccd1fde81f28830049b57e2341b79f8401436 SHA-256: f4efe900070a8150ea1b89f2c132d9437f75d0463142c7222efc6ac05dc02b47
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://togeltop.net/contents//files/zikopidoko.pdf In PDF document text
    • http://hpworld.hu/data/pic/Image/file/12114858164.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/xupozamomozilu.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-8-21/20210821142257970286.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/24746350756.pdfIn PDF document text
    • http://atek-ent.com/upload/file/lowonixako.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072226b718d3---sepotopi.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/e78b384b09815bbbfed37f6d3a1286ef/vumofezuvaju.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/91520357934.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897f318f169---nosiwaxunajepugotukabi.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752116546d2---52422387895.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/xuzululimitevilonoweni.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/sugadulazu.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/kovekerevojifuxufelowas.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38465121228.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/18705558735.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094d499a5ef5---fipoxugexisun.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/984cd894a77a29a997cd5768026cc7e5/71764910891.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/qmv7qsgeb64c67otbgo7604ah3/21967004502.pdfIn PDF document text
    • http://zatacorp.com/upload/files/latataduzosad.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/69241609344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=agresti+foundations+of+linear+and+generalized+linear+models+pdfPDF 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_off0000cdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB6 18384 bytes
SHA-256: afd440bdfd69d7e790ccfff22e2ffdbcb7b1d9859a167b3c2701f224d87936dd
font_01_sfnt_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001156b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156B 10980 bytes
SHA-256: d5451a36e07f518624aefd2043a9aee0fb57dd4a55ac8e388a2a05082b1f1bda

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