Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4140e4a737a95ba…

MALICIOUS

PDF

79.1 KB Created: 2021-04-12 06:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7e86d92ba953d5368aa9c994dfb32dec SHA-1: 73d1a811ca6e0b19360f3eb215cc9c2400cabf6f SHA-256: b4140e4a737a95bac43b01bd6ed1155fac018f61229aed424b17177ffd9922e9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains numerous external URIs, with one pointing to `https://golowaki.ru/strik?utm_term=canon+sx160+is+rechargeable+battery`, suggesting a phishing or malware distribution attempt. The PDF is identified as a link farm on disposable hosting, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/strik?utm_term=canon+sx160+is+rechargeable+battery PDF link annotation
    • https://nefalitarula.weebly.com/uploads/1/3/4/3/134308949/01feb249c738.pdfIn PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/buwulobun-bimebe-guzakid.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/gdiUbVV/rozunusisipukuv.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/how_to_cook_burgers_on_a_lean_mean_fat_grilling_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_60325fc7441c5.pdfIn PDF document text
    • http://static-start.top/android_studio_output_apk_locationgn6en.pdfIn PDF document text
    • http://topstop.site/garmin_vivoactive_3_hr_user_manualaq77b.pdfIn PDF document text
    • https://nedijevir.weebly.com/uploads/1/3/1/4/131406348/3020632.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/ricgigp/sensitivity_pubg_mobile_emulator_terbaru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370089/normal_5ffd4cac02630.pdfIn PDF document text
    • http://aycotoro6.xyz/41029727297uxdav.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/gcn2ieF/25865516960.pdfIn PDF document text
    • https://zemibojonu.weebly.com/uploads/1/3/5/3/135324970/tivele-sebozol.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/aide_memoire_commande_linux.pdfIn PDF document text
    • http://verifiedbadges-form.com/cisco_ise_high_level_design_document_template63ksm.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/toastmasters_certificate_of_appreciation.pdfIn PDF document text
    • http://mydenverneighborhoods.com/kindle_cloud_reader_not_ingt10su.pdfIn PDF document text
    • https://vavinaxedekofew.weebly.com/uploads/1/3/0/9/130969509/0d11beda34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07615fc-3f53-47eb-b001-7f5971344c40/diary_of_a_wimpy_kid_14_book_collection.pdfIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/basics_of_electronics_and_communication_engineering_free_download.pdfIn PDF document text
    • http://xovolefewawex.atwebpages.com/lofodixegivaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e7380d-18e9-4ed1-8d83-0798b3dad51b/nordictrack_exp_1000_xi_troubleshooting.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 5624 bytes
SHA-256: b035f90bf1a277bf5a47c12e117724ff5a62efa4c64b4940c1ad03ccd3e5eaca
font_01_sfnt_off000101f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 14036 bytes
SHA-256: e05b34115d09fd0e427703d6ec23e4a6a2e02c2871571f1f9aa6baab5ff861de

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