Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bbfd4d0b20a128…

MALICIOUS

PDF

91.1 KB Created: 2021-03-11 23:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3813e44f9a9735bc9a9ba286b2c963ff SHA-1: 858640343ade458d1b1f85d2cd3f02ecbf0c2e80 SHA-256: 93bbfd4d0b20a12872895eb4985cfed677f3a29d6acd133c9a47d62cc174fa93
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a high concentration on disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/wix?keyword=bonaire+evaporative+coolers+manual PDF link annotation
    • https://cdn.sqhk.co/tukawezezo/ieiagjo/ghost_rider_3d_game_download.pdfIn PDF document text
    • http://denazofumoxebo.iblogger.org/appendix_in_technical_report_writing.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/hcGhhzE/mixanu.pdfIn PDF document text
    • https://cdn.sqhk.co/tifisizeliz/9hhCQhe/netusumimubaje.pdfIn PDF document text
    • http://fugilugidijud.22web.org/80725680854.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/igjiggJ/dedigoti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bamemuwibe.epizy.com/nokia_android_phones_under_4000.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_baf8cb8bf4d748d19236838e62798579.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9c8c75-1622-4430-87d0-b3061348af94/piwilubedal.pdfIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_bb1b769f3be740f6ac48780e64177ef4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1c0b96-3efe-4565-b6f7-6ae53cbbad57/what_are_the_biblical_qualities_of_a_good_leader.pdfIn PDF document text
    • http://xewebumobodoris.rf.gd/83021583978.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_972f18ed502644f69f6c7ca8ee131c9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e154364d-00f5-4b9b-af3e-8d70b532d85a/92004586585.pdfIn PDF document text
    • http://sozidasagekixur.epizy.com/50562664915.pdfIn PDF document text
    • http://sijekovurodubo.rf.gd/73494937056.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_8ade3a4fab2c42008a4a751d9032b61b.pdf?index=trueIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_05445c6578674a3d82175c389e5df384.pdf?index=trueIn PDF document text
    • http://nibewisule.epizy.com/3353822059.pdfIn PDF document text
    • http://wadedizori.epizy.com/landscape_images_hd.pdfIn PDF document text
    • http://kobuxotaregudes.rf.gd/restful_web_services_tutorial_for_beginners_c.pdfIn PDF document text
    • http://suwisekuxowiw.epizy.com/81852281612.pdfIn PDF document text
    • http://tavuvije.epizy.com/nebamulimapogusit.pdfIn PDF document text
    • http://xapemekofutomun.rf.gd/auto_alphabetize_google_sheets.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_off00012405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12405 5188 bytes
SHA-256: f6a9f9345960971daaef3a2ab5bd7779cca046d7871d4dea7b8c5cfa67e601b6
font_01_sfnt_off0001359f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359F 12964 bytes
SHA-256: 38919538c4cfb37fe6faabd05e996ce6494d86f40bef7c8b99605414b117b5b1

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