Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fcd4d6dd71c04a2…

MALICIOUS

PDF

72.5 KB Created: 2021-03-26 00:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a5d624b585afb9b6e051963417b7a324 SHA-1: 904f5a6dd0320759a745c50bc50739db922fb94b SHA-256: 6fcd4d6dd71c04a271fbc31b2437a617ecc8a5a2535529022fddb6aba4204210
166 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a password-protected-archive lure. 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 0.9993

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=blues+watch+party PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497650/normal_6017fa8a3d044.pdfIn PDF document text
    • http://it50save.info/2010_camaro_rs_headlightsn4crq.pdfIn PDF document text
    • http://dexiwakuxabef.medianewsonline.com/nufizijixelunu.pdfIn PDF document text
    • http://openplafond.xyz/tikuvefubugom5k4yy.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/husqvarna_450_rancher_bar_length.pdfIn PDF document text
    • http://teksalle.xyz/dimesuvepopasexewuzeoc3oz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fca04635081c.pdfIn PDF document text
    • http://helplnstagram-confirm.com/factored_form_to_standard_form_polynomialy9u1j.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/brunner_and_suddarth_13th_edition_ebook.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/what_is_the_default_password_for_night_owl.pdfIn PDF document text
    • http://finansi-7.online/fuguwejavomekugc4g4.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/cours_d_anglais_grammaire_gratuit.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/5e5ea0d3-b08e-4fb0-a409-6fbe0e07267c/jogexinodusazimuzabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2b4a6d-2f00-482f-9d7e-46274de6d1ca/luzojobakivovenoguvowe.pdfIn PDF document text
    • http://jiwuwusa.epizy.com/ibm_blockchain_platform_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a66a3db8-8f24-4168-9f11-93d8d767a865/karcher_k4_full_control_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b7c920-2dec-4e15-912d-826e5e5caeff/danodop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccaabb95-fc77-4671-9015-072660ac5e29/funusekavejurelizesisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/241d0957-d3e0-4dbb-9704-627efbdd0bfb/tusavuwefonuveroxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee060df9-d7a7-4070-aa4b-3a5733f5e810/navy_diving_suit_2020.pdfIn PDF document text
    • http://fonivez.epizy.com/mtabolisme_des_composs_azots.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18031c1-85ff-4c24-b417-a0531761288a/fiddler_on_the_roof_movie_watch_online_free.pdfIn PDF document text
    • http://gisatazab.rf.gd/block_email_yahoo_mail_android.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_off0000ddea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEA 5264 bytes
SHA-256: 7450863ebab0052ce350288bab63c925b4267fc24577e73c7150b6fd4c9b089a
font_01_sfnt_off0000efe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 10856 bytes
SHA-256: cc2b6aff77eff08534592a7b439c3ba6dccdc45389475ea988fd3b9882fabb58

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