Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed3beaba1fba346…

MALICIOUS

PDF

81.9 KB Created: 2021-03-13 22:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cdccf18a60c4b3d41758f06a1ca4bb09 SHA-1: 99edcad2448c93cba1a8ab224058882d1de78007 SHA-256: 6ed3beaba1fba346fd3152fcff65c4ed8f8bba0cd4609a19f009122cb049301c
126 Risk Score

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 0.9990

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://mezovuduw.ru/award?keyword=the+cost+of+discipleship+by+dietrich+bonhoeffer+pdf PDF link annotation
    • http://polikarmonolit.ru/glencoe_population_biology_virtual_labw68tg.pdfIn PDF document text
    • http://wepisoja.mypressonline.com/learner_centered_approach_to_language_teaching.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/12764565941.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/bupiroxikasowibeson.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421937/normal_5feccee7c582a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421056/normal_600273ed87e92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381997/normal_6000ab35686e9.pdfIn PDF document text
    • http://ayazshabutdinov.club/7987807447359bjs.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/feridilo.pdfIn PDF document text
    • http://zaliv2k20wowowowoow.xyz/nuvopekejaxupukidao354c.pdfIn PDF document text
    • http://mugurapit.sportsontheweb.net/pdf_file_opener_free_download_for_pc.pdfIn PDF document text
    • http://goromeo.club/how_to_use_accu-chek_multiclix_lancet_device5wk7b.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/new_yorker_student_subscription_tote.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
    • https://uploads.strikinglycdn.com/files/4254f494-30e4-4a8b-8b9b-5f1c45309697/what_do_dapples_on_a_horse_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a89544b-f310-4f83-a9dd-6135d4860864/ap_english_literature_and_composition_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e665d98f-bd73-4a5a-a51c-db8936add197/59157356250.pdfIn PDF document text
    • http://zezewesiwakoruw.rf.gd/22243473093.pdfIn PDF document text
    • http://waromewozepivo.rf.gd/dell_command_update_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8caac3-cc43-4f57-ac4d-1006207090c2/the_5th_wave_summary_sparknotes.pdfIn PDF document text
    • http://tagenujipitedep.rf.gd/kitatapamebetufetaj.pdfIn PDF document text
    • http://nururipunorip.rf.gd/brown_driver_briggs_online.pdfIn PDF document text
    • http://suboxasolu.rf.gd/twilight_2009_full_movie_online_free_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0828d68d-7d9d-477e-8b33-83c90afbb825/voyager_legend_vs_5200_uc.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/pitalokenufidimisajo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 5012 bytes
SHA-256: b6496bc6e45f9bfc3cfe4ecdf9846ec3a7649fa5d90ca6e56d143b27a4c8243c
font_01_sfnt_off0001078a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078A 10568 bytes
SHA-256: 14e6a55ce8d2cfde24a990398d3365b1b30222614c6838204ddfc80002c974b2
font_02_sfnt_off00012bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3