Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a83f7ebc5096d3a…

MALICIOUS

PDF

82.0 KB Created: 2021-03-16 20:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c726f79fd79a66bf71472e69819eb6a5 SHA-1: be297c288099a82667a4575a5edd27e0925a4da0 SHA-256: 3a83f7ebc5096d3ad66e0a79a5ea176b6ca402eeada46a8865cc0b5304b6c256
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

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://midufefew.ru/strik?utm_term=us+army+reserve+death+benefits PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416661/normal_604ab1da2e1ec.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/alex_rider_serie_tv_trailer_italiano.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/16642414066.pdfIn PDF document text
    • http://rizovog.iblogger.org/install_play_store_on_android_phone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_5fe66c64dc91d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527164/normal_5fff6d34cceda.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/62335361704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369915/normal_5fce413c332ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/kilamimew.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/96866110141.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/financial_modelling_excel_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74841272-9b0b-44c3-9344-e48b96f1181a/best_video_game_for_11_year_old_boy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e822da5-051d-409c-a132-294c9add0141/jubomeresalagebepipup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe757e35-9a36-4498-b3ab-3a9e33f6de1a/dungeons_and_dragons_campaign_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/39503288287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53df66e8-e7f0-4361-88c8-bdfaf40a6f94/744889774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd1792e-a939-458a-8dda-ebae22ad9969/58253202623.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/46951364260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad663cf-c14e-420c-9f11-4e2a2b4e636d/bamuvusudororew.pdfIn PDF document text
    • http://disoluje.myartsonline.com/vuditelizulitulisuf.pdfIn PDF document text
    • http://pikuvideposem.epizy.com/sona_guide_season_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d3c75c-26d3-4207-ad0c-515095c287c9/781366538.pdfIn PDF document text
    • http://lodufuvu.epizy.com/54778267611.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/kepakigisedalilugetitanux.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_off00010420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10420 5408 bytes
SHA-256: 114c0d0d18f6ae39d2124530f6693525fcfbe4ffb54a85d03d224df25104830a
font_01_sfnt_off00011665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11665 10612 bytes
SHA-256: d5ff831c3f96b976035b29c1ad5271a980a3ac3bba6c0e150d95e8f87032b20a

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