Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0668857e62a7804…

MALICIOUS

PDF

80.5 KB Created: 2021-05-15 04:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 150907c7df17dfa954a8fafbf0f49d66 SHA-1: b129ae992cd52e90d760e1c0f0ff9992bbbc61f6 SHA-256: e0668857e62a7804abe8a838cc53ee58611c65494d2b0a1b642ff2bdba41dfe8
186 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=how+much+is+a+coffee+box+at+dunkin+donuts PDF link annotation
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/6bb03.pdfIn PDF document text
    • https://kagifinozadobet.weebly.com/uploads/1/3/4/9/134902547/6849240.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/ihhgcii/vlc_video_player_download_for_laptop.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/gujepiz.pdfIn PDF document text
    • https://cdn.sqhk.co/baxewoxevum/ha3hcKE/91141173422.pdfIn PDF document text
    • http://nakavadibukukep.22web.org/gujoduxuxuxagim.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/4671813.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/QjMhcgc/superhero_quiz_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/nogupuzejewe/ggP6Xs7/95030101779.pdfIn PDF document text
    • https://tupusedaluniji.weebly.com/uploads/1/3/0/7/130738871/7352627.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/jizjhrD/froberg_s_farm_in_alvin_tx.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/weight_loss_diet_menu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lazasubesuwup.epizy.com/92087072053.pdfIn PDF document text
    • http://wozitoso.atwebpages.com/vuvuveju.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_84207b32be2b4dd09cd91829ce7ee6ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobito/bojegowaxutubire.pdfIn PDF document text
    • http://jerovobaba.rf.gd/balanza_de_pagos_y_balanza_comercial.pdfIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_18b78e77bd5c42ceafaf4f12c88b251f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jupoti/circumference_worksheets_free.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_5e546ee088134830aea408684113f756.pdf?index=trueIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_472deff893974058a2a429a5fafbeade.pdf?index=trueIn PDF document text
    • http://dawejur.atwebpages.com/riwesusexenenoza.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/citra_android_pokemon_ultra_sun.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_ab75b665c69640aaa1907d69dc49d980.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/kuzanufovulenoxixo.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010c26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10C26 17204 bytes
SHA-256: 92f08340c429f1094de22085c4ad1345635b250ff45af295a94088b59d9335e4
font_00_sfnt_off0000d502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD502 5340 bytes
SHA-256: e02f2df458eca9db89154ce95ef513c8639b4f29d436013a494b078d5afdb3a7
font_01_sfnt_off0000e71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71A 10756 bytes
SHA-256: 4fad04672c29b12ef2dd1c2f27e073831119e1dba29e63d907634853d003f081
font_03_sfnt_off00012544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12544 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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