Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cd61d3bf1ecb43…

MALICIOUS

PDF

111.8 KB Created: 2021-04-01 10:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 130e78ffe42c8490481c7d82869e4eb8 SHA-1: 504ce767e3da6fee5dcd1933925f5fcecfe42934 SHA-256: 56cd61d3bf1ecb4336ac2deef469f7ec6ef97f9dba77d846bb8e925b7adb5ce0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with the heuristic PDF_URI indicating an external link. The embedded URL, 'https://golowaki.ru/award?keyword=career+motivation+definition+pdf', suggests a phishing lure disguised as a document. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection point towards a malicious PDF designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/award?keyword=career+motivation+definition+pdf
    • https://cdn.sqhk.co/xojelumegasi/awhg9ij/la_novella_degli_scacchi_amazon.pdf
    • https://cdn.sqhk.co/fopalixogul/aha7jf4/free_calendar_template_october_2020.pdf
    • https://cdn.sqhk.co/lejesapazud/ihibejc/2603399350.pdf
    • http://jofufunobek.sportsontheweb.net/josokelotuto.pdf
    • https://cdn.sqhk.co/nomelafu/ZTjcFAK/off_road_race_cars_app.pdf
    • http://xupulakikovuxo.mypressonline.com/79571337501.pdf
    • https://cdn.sqhk.co/nowavutu/2zFjfib/packers_game_time.pdf
    • https://cdn.sqhk.co/doginifa/iejg1Pi/69888500985.pdf
    • https://cdn.sqhk.co/moturalogupe/4cef6gh/emotional_freedom_technique_gary_craig_video_breathing.pdf
    • https://cdn.sqhk.co/bexefoboxevi/KhiSjgK/42733205219.pdf
    • https://cdn.sqhk.co/lidupusumoj/x8Mjbjh/hot_100_radio_station_spencer_iowa.pdf
    • http://pugisapi.mypressonline.com/fitumefiborad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fd0d1b85-7bbd-4f52-b914-3033ba6eecb6/what_are_the_types_of_memory_management.pdf
    • http://gagaresereveku.epizy.com/sims_3_store_content_not_showing_up_in_game.pdf
    • https://s3.amazonaws.com/zonivezada/bose_lifestyle_remote_control_settings.pdf
    • https://s3.amazonaws.com/jarawaxanivu/shell_logo_vector.pdf
    • https://s3.amazonaws.com/selivuvumepaveb/what_is_hm_marketing_strategy.pdf
    • https://s3.amazonaws.com/pibajuwi/cm_browser_apk_android_2._3.pdf
    • https://uploads.strikinglycdn.com/files/81f7522f-5eca-44f9-b932-a2b62a0bcd31/misejogajujoworoboburedu.pdf
    • https://s3.amazonaws.com/kujesulad/apk_pic_grid_collage_maker.pdf
    • https://uploads.strikinglycdn.com/files/f17844a7-5b02-4adb-b5c7-54e53e0d1207/restful_web_services_json_example_java_without_maven.pdf
    • http://potefedezazox.rf.gd/dosokafelawuxogizubatawel.pdf
    • https://uploads.strikinglycdn.com/files/7986eb6e-bbd6-46ff-9593-28350b2f79f6/how_to_warm_up_properly_for_weight_training.pdf
    • https://uploads.strikinglycdn.com/files/0d8f296d-f0d7-4754-bf84-838a9d1ae856/82889238944.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_off00017940.bin
f43818edb305fcee37c90c06a2832128301322d1f53074f6173310c7c505f592		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17940 4944 bytes
font_01_sfnt_off00018a02.bin
2c5de9602be3798b3c726fc8af7c97244f42d9dd28c8bc8a3c64a49c7e3815f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18A02 11408 bytes

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