Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1837bded99054a…

MALICIOUS

PDF

76.0 KB Created: 2021-04-08 23:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 98b536817dd98d863dfa28b233a1a33f SHA-1: 512dc31f66ece767ed9474a30462b611021b5a34 SHA-256: 9e1837bded99054a54c7f73bf2497a17297ca8e0e3cbf42e4a7a5f8deb446e95
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan distribution. The document body, though heavily obfuscated, contains keywords related to drivers and urgency lures, aligning with the 'SE_URGENCY_LURE' heuristic. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to redirect users to malicious content, likely for malware or phishing.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pelibifir.ru/strik?utm_term=m-audio+keystation+49e+driver+windows+7+64+bit PDF link annotation
    • http://banuzatama.22web.org/bharat_movie_songs_ming._se.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/ggoicpJ/71956551277.pdfIn PDF document text
    • http://dezirutumevolu.iblogger.org/repujojix.pdfIn PDF document text
    • http://bujenaro.scienceontheweb.net/ronabupemid.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/fepajufapedet.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/hfjcYij/stick_around_with_you_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/VjeOThg/ranenibuga.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/anemia_aplasica_idiopatica.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/auxiliary_view_exercise.pdfIn PDF document text
    • https://cdn.sqhk.co/jesarijufe/iggjigC/air_raid_siren_notification.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maretubozewugi.myartsonline.com/79810559561.pdfIn PDF document text
    • http://fawivemepogu.epizy.com/sans_bad_time_simulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021502a4-08ca-4c76-b0fb-f94d2894c5db/baby_groot_dancing_toy_for_sale.pdfIn PDF document text
    • http://vakifavu.onlinewebshop.net/xewirititutufug.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/metuber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60857fe9-3dc3-4f8e-8509-4a0e6db7df09/what_does_it_mean_if_a_man_winks_at_you.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/simple_income_statement_and_balance_sheet_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/11814479325.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/wusanesatetubakimenusuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e91e2a6-b28c-42e1-bd0b-4ce991d36171/the_best_keto_cookbook_out_there.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_off0000e5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 5760 bytes
SHA-256: 8abd10e7ea5c096c0ff85f1eddba0b0eec30d1d7a244a1f400687b8dd0afe69a
font_01_sfnt_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 11552 bytes
SHA-256: 8457682991857fcd2481551f7a200c0dfedd3c91bddeb05915a8a484c29a0b98

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