Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e005cd7a8dc824…

MALICIOUS

PDF

126.0 KB Created: 2021-03-08 21:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2b5409b90a2b63eedd34285fdd23cc49 SHA-1: 3778aa45a725e5b725a742c3ef691ffb47eb332a SHA-256: c4e005cd7a8dc824cc6a468e893c047b767221704738aa6097dd0fe21369e814
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 0.9968

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://lozipotod.ru/123?utm_term=3.+standard+deviation+and+standard+error+worksheet PDF link annotation
    • http://ranking-se.com/old_bengali_comedy_full_movie_freeyghg4.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/8951465.pdfIn PDF document text
    • http://sesalon.xyz/46990632846wsdzd.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/7720877.pdfIn PDF document text
    • https://feveronibamuja.weebly.com/uploads/1/3/5/3/135300243/1552660.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxogugexi/3jjggeK/bestwap_bhojpuri_bhakti_song.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/jjjeq5M/periodic_table_hd_image.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/overeaters_anonymous_12_step_book.pdfIn PDF document text
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/c36c5ac3739a52.pdfIn PDF document text
    • http://lexaxak.mywebcommunity.org/dell_1610hd_lampa.pdfIn PDF document text
    • http://myyshooop227.site/sizefgsp4s.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/pokizakavivufibomazilar.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/how_to_clean_scunci_steamer.pdfIn PDF document text
    • https://cdn.sqhk.co/poxedomeke/hmpGOcV/troom_troom_apocalipsis_zombie_en_espanol_episodio_10.pdfIn PDF document text
    • http://febisulel.22web.org/eton_emergency_weather_radio_review.pdfIn PDF document text
    • http://reduslim-eu.site/miratidapedeventwytf.pdfIn PDF document text
    • https://dilabugesoko.weebly.com/uploads/1/3/4/6/134627797/nojokalop-manemugiputo-mevixolamota.pdfIn PDF document text
    • https://cdn.sqhk.co/wusuzevomo/Kgjvhhg/go_fish_card_game_two_players.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/hW0gfqm/21453244316.pdfIn PDF document text
    • http://tlgfree.xyz/16384450817h2cv5.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
    • http://kenavegolixase.epizy.com/cashier_training_course_in_jamaica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3f515d-1b79-4e3e-9cc7-e6bdb638978f/what_would_u_rather_questions_funny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2f96d8-ce30-44f7-9cb7-48edc5619ef4/83716093146.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/simple_bio_data_form_for_job.pdfIn PDF document text
    • http://zitovidenelanus.rf.gd/action_research_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ebf360-c413-4c97-a57f-857058cc0542/38290222335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38599995-e141-4cbb-a981-cc1c5a85d305/88301005817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e823a2f-90d0-459d-86f9-61d5a2517978/bushnell_tour_v2_slope_edition_rangefinder_review.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_off0001a45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A45E 4984 bytes
SHA-256: ca08e78dc74d6ad58ba6d31af95a6192b45ee55850bdb8b7e94433c22fa1fa35
font_01_sfnt_off0001b54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B54E 11536 bytes
SHA-256: baa68b261686b586e96742be8d012e897851799fcb99079c3251b6b4aeb2e14e
font_02_sfnt_off0001db27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB27 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e