Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5176f4f932efa3…

MALICIOUS

PDF

80.3 KB Created: 2021-03-17 08:28:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51eb38ec48a899bc47ef1cf68b3b748a SHA-1: 29a21e75cd205537d0e876c574ed2b7eef9daedf SHA-256: 6c5176f4f932efa3b942dfb06ecea8cd5a6d4f8e078303f74f6332ba4f60acf9
136 Risk Score

Malware Insights

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

The file is a PDF document that contains a URL disguised as a worksheet quizlet. The presence of the 'SE_LOLBIN_RUN_COMMAND' heuristic and the ML classifier output strongly suggest malicious intent. The embedded URL likely leads to the download of a malicious second-stage payload, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://vilenefex.ru/wix?keyword=ecological+succession+worksheet+quizlet
    • http://dumubemajizukov.medianewsonline.com/examples_of_restaurant_reviews_essay.pdf
    • https://cdn.sqhk.co/pujazojiwixi/lgcEYjb/cute_animal_wallpapers_for_iphone_6.pdf
    • https://cdn.sqhk.co/xurajalijok/FhfuK0g/flight_club_consignment_phone_number.pdf
    • https://cdn-cms.f-static.net/uploads/4373261/normal_600f4d7c62d26.pdf
    • https://cdn-cms.f-static.net/uploads/4419423/normal_604d0d75dc763.pdf
    • http://fozivot.mypressonline.com/86339206169.pdf
    • http://pofuxubilet.sportsontheweb.net/how_do_i_set_up_my_roku_streaming_stick_without_a_remote.pdf
    • https://cdn.sqhk.co/rawatajizefu/lbedjiF/tuvuxuzuxazomewalazude.pdf
    • http://rimiripa.mypressonline.com/analysis_of_data_using_excel.pdf
    • https://cdn.sqhk.co/zubavagi/2hgig92/mx_player_android_app_apk_download.pdf
    • https://cdn.sqhk.co/kopizikob/dnUWhcQ/gabijimuxukema.pdf
    • http://xisumagogali.getenjoyment.net/teromukat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f373d666-f2e3-42b5-9cf5-93bcbdf8aac7/cartesian_coordinate_system_and_polar_coordinate_system.pdf
    • https://s3.amazonaws.com/potamotaz/ligilokovosaxe.pdf
    • http://bigapenegig.atwebpages.com/12205225795.pdf
    • https://s3.amazonaws.com/gisujubolidine/61100738416.pdf
    • https://s3.amazonaws.com/likadojivivofu/major_climatic_regions_of_the_world.pdf
    • https://uploads.strikinglycdn.com/files/34421929-a6a0-4f06-bce9-c0d9da488cb3/the_execute_permission_was_denied_on_the_object_xp_cmdshell.pdf
    • https://uploads.strikinglycdn.com/files/1cb22adb-b609-45cc-b68f-81367df20d0e/bukujikefobutiwewuwabo.pdf
    • http://fufudaloxola.onlinewebshop.net/the_female_brain_movie_cast.pdf
    • https://s3.amazonaws.com/xijalovelokolep/limosux.pdf
    • https://s3.amazonaws.com/bededuxotulapil/baby_bjorn_air_carrier_manual.pdf
    • http://sulijugofogim.onlinewebshop.net/85656167110.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc53.bin
e310db10afaafb518a64f723327e0f2e7af7c06f21f7780af3c7716053d43ea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 5348 bytes
font_01_sfnt_off00010e9e.bin
a6a403cb524439217d6180c22643267ee2f2aa4e4aaeb793d11bfa1180f414e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9E 10788 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.