Malicious PDF — malware analysis report

Static analysis result for SHA-256 074132d913722ebb…

MALICIOUS

PDF

87.8 KB Created: 2021-04-21 01:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68a137f301235a234db69e5411ad6a84 SHA-1: 791a2ed83cc3b5434c4819e3c2de6d453c4f8f4a SHA-256: 074132d913722ebb530c873dc9d18279aab1084b596ac337c76cc2f1a5b2a961
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'dafemum.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a common search query, suggesting a social engineering tactic to encourage user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=why+does+my+cuisinart+coffee+maker+turn+off
    • http://afracheat7.xyz/cuanto_es_1.75_metros_en_pulgadasnmvdi.pdf
    • http://mogoxopedutisaw.iblogger.org/tuxibumewepapafaso.pdf
    • http://reduslimitaly-ufficiale.site/subway_nutrition_protein_bowlyuop4.pdf
    • http://ig-copyrightviolation.com/664182402911n4s9.pdf
    • http://repochka.site/kibebodemutitopajauhn2l.pdf
    • http://podarokinsta365.site/73304489065lgig6.pdf
    • http://forecast.bet/equipment_world_spec_guide_2018yt3nl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/97542f09-47e4-4497-ad26-1cc766dda102/vubixi.pdf
    • https://uploads.strikinglycdn.com/files/29d7f9ed-0be5-4a5c-bec5-e393509821f9/zuvugajuji.pdf
    • https://s3.amazonaws.com/zagubip/abc_online_movies.pdf
    • https://uploads.strikinglycdn.com/files/7a5c1905-42ed-4a7e-8aed-5b5c1c4e3905/kitchenaid_superba_oven_parts_diagram.pdf
    • https://uploads.strikinglycdn.com/files/f5b076d8-3938-4339-9ba5-53c55aa53323/intex_saltwater_system_26669eg_manual.pdf
    • https://s3.amazonaws.com/bupijila/why_the_quran_was_revealed_in_arabic.pdf
    • https://s3.amazonaws.com/gewisetug/3737264167.pdf
    • http://xirotowukutizu.epizy.com/private_bus_ticket_format.pdf
    • https://s3.amazonaws.com/sagotomagin/34413225661.pdf
    • https://uploads.strikinglycdn.com/files/7a3ae8d1-3857-43ee-b686-bbdf50a531e2/what_does_it_mean_when_smoke_detector_flashes_red.pdf
    • https://uploads.strikinglycdn.com/files/04af2158-fcd4-4021-b69e-43619cf2b2d3/72992043062.pdf
    • http://ganusigesu.rf.gd/mibakubasanurowume.pdf
    • https://uploads.strikinglycdn.com/files/ae51c1f9-01de-4769-a66c-f46b1799811c/rijoretezavolozubobi.pdf
    • https://uploads.strikinglycdn.com/files/b5ef6a78-1ac6-4ad3-a2d9-3b278376ff6e/is_weight_watchers_food_sold_in_grocery_stores.pdf
    • https://uploads.strikinglycdn.com/files/1b540185-94ca-45f3-9220-d0f1cce3cae6/what_is_adaptive_project_management_life_cycle.pdf
    • https://uploads.strikinglycdn.com/files/309e7565-6d59-4fa1-b546-982925fa6d51/comma_exercises_with_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d9f.bin
552d38476aae0538fa1f48d8852aa9c1aab38b17057d291541444ab779aba056		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 5288 bytes
font_01_sfnt_off00011f80.bin
9b5d1fd026ef6a6226e066dda150125a9d9ac13696aa55c3ca38a27f8b87e982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F80 10680 bytes
font_02_sfnt_off00014351.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14351 4324 bytes

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