Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ebcf47f7d726e1…

MALICIOUS

PDF

83.4 KB Created: 2021-04-28 02:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4117cd94295176b731401a451facdb30 SHA-1: 17fb827bb9abcc8fd103f71ce83ea2621f20c84b SHA-256: a5ebcf47f7d726e1a075255aa79799c0479bb8936dbb8b8543c874857070eed8
134 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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=oculus+quest+architecture+apps PDF link annotation
    • https://kojaxinepizoju.weebly.com/uploads/1/3/1/8/131856409/butiputete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_606265ddef4d3.pdfIn PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/suvif-jozelometen-gagewukot.pdfIn PDF document text
    • https://fujifarilopo.weebly.com/uploads/1/3/4/4/134483008/6344174.pdfIn PDF document text
    • http://wodunobogigav.22web.org/darkness_those_who_kill_episode_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481663/normal_5fd662839661f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_6032394be0b78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491164/normal_6047cac411b65.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/6681458.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/lodazojamuva/dezuseluxunuget.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/receptionist_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • http://dolapipikafaf.rf.gd/agatha_christie_poirot_filme_online_subtitrate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b017042-e8a6-4535-a913-99b7fe9a0746/76800117078.pdfIn PDF document text
    • http://kawojimulogizef.rf.gd/data_analysis_with_excel_tutorials_point.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/20738716905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac8dcd37-38d6-421a-9a5b-4e490d858b76/38447798564.pdfIn PDF document text
    • http://kosigasarem.epizy.com/wosevotenikokif.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/18525983000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77051c6d-6a5f-4fc2-87a3-ebeca8cc7a2c/27926152390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d385ac-c8d5-4645-ae34-1f5d19815bc4/can_i_charge_my_fitbit_versa_without_the_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6f6164-b0b0-4a94-a75b-7bbaf843dfbb/muxigowifotu.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/components_of_strategic_management_ppt.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_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 5176 bytes
SHA-256: b74a28b90af3fd5cbfb8fa44f8b1755a004430f1a3a4769930462255708f5f33
font_01_sfnt_off00011854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11854 11760 bytes
SHA-256: 12e8b0aac34ff3f1bbb6c03882ebefe7bebd68a9720db95cc672aa5b79364bf3

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