Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8d0e9c1da00a74…

MALICIOUS

PDF

73.0 KB Created: 2021-03-04 21:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aff32ab9c14b3f852dc66c0e2adffd2e SHA-1: e0010405b01c343b7dc0858b3c82e49955d8c8d4 SHA-256: fb8d0e9c1da00a74033e21d2bbfa0b9d153fffff1c1369d56908bf6357107f60
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'subnetting for dummies video', suggesting a lure to attract victims to these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=subnetting+for+dummies+video PDF link annotation
    • http://laludinemolat.sportsontheweb.net/math_books_for_grade_3_deped.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/CjhesE0/52073272744.pdfIn PDF document text
    • http://samozanyat.info/birdland_trombone_sheet_musicnonmp.pdfIn PDF document text
    • http://bestcreditcheck.info/rothys_shoe_size_guidezh2kd.pdfIn PDF document text
    • http://topsale.pro/celebration_chocolates_nutritional_informationjjg6c.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/the_pact_movie_review.pdfIn PDF document text
    • https://cdn.sqhk.co/derebeduno/hh4mxhc/dizefizifesapefogive.pdfIn PDF document text
    • http://edalovert.xyz/lawn_boy_522r_snowblower_manual9trof.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/fifty_shades_freed_movie_ending_scene.pdfIn PDF document text
    • http://datingdate.site/case_ih_troubleshootingtv3zm.pdfIn PDF document text
    • http://contentmedialiteracy.com/bob_ewell_to_kill_a_mockingbirdzg1ks.pdfIn PDF document text
    • http://naturebiolog.space/besikijogojupew3q2xn.pdfIn PDF document text
    • http://sellforce.ru/printable_cute_kitten_coloring_sheetsf9hrd.pdfIn PDF document text
    • https://cdn.sqhk.co/zolokike/jhsBYgi/crochet_crowd_color_combinations.pdfIn PDF document text
    • http://dhl-order.info/pinatamasters_download_mod_apkvqrga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikanelomer.onlinewebshop.net/popepexasovevuxiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf185ac8-56bf-4fab-84a4-675ce2dd2921/48398685983.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/o_reilly_python_machine_learning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d6440d-99e2-49f2-a305-8079ce668ca7/nasarorotaworokefowiguwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a59f5696-8593-4727-905a-0c38349a42d5/how_to_replace_heating_element_in_whirlpool_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/samsung_galaxy_s9_used_price_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/comparative_advantage_worksheet_high_school.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_off0000e030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE030 5288 bytes
SHA-256: 7b70899ff6775e3947fcf64b526719c875dd96141b6019f9755c916846ec4299
font_01_sfnt_off0000f225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF225 10768 bytes
SHA-256: d6f268570eca2d55e8d2098be64c18da60b6dc6a1284b4d85d0234af16e2653d

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