Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6bcf1bdbd1192c…

MALICIOUS

PDF

90.2 KB Created: 2021-06-08 11:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4f98f94ae30dbdb931ce56e7527c7d11 SHA-1: 3d9a634b459c491129eee8c528836a9a57b46865 SHA-256: 7f6bcf1bdbd1192ccd0b62ac34dbf87cc419c268afae95778395ae1f94423af6
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious. A key heuristic indicates it presents a fake CAPTCHA or human verification prompt to the user, a common social engineering tactic to lure victims into executing further malicious actions. The embedded URL likely leads to the next stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://queure.ru/pbw?utm_term=la+grande+bagarre+de+don+camillo+zone+telechargement PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43331a4-7881-45b0-a7fe-3e7594f11c30/midi_drum_patterns_ableton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7b203e-b72c-4f63-8139-b81f0848dc1b/bosch_dishwasher_installation_rebate_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5621e26-b0ec-4a1c-abaf-fabb5d5baf9b/how_to_add_textures_in_blender_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccdd3bd-b34c-45fd-b611-37c9731fecb7/nordyne_furnace_troubleshooting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22b74d0-c31c-48f6-a6f7-b22d219f787e/how_to_adjust_stihl_chainsaw_oiler.pdfIn PDF document text
    • http://tijigika.pbworks.com/f/jodinen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c61b422-3c35-451e-85f0-02da1de0421b/tacitus_annals_12.37.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a73837c-adfa-4182-b8e1-6cba65884b76/computational_fluid_dynamics_software_market.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45effac2-fae0-48dc-ba92-09affca71b65/sarkar_3_full_movie_watch_online_free_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfa4cbb-f01e-4679-a2b6-8a3bcd86277b/word_format_meaning_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f348ee70-d956-44e5-aa37-eb72482ef436/55629178621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbafbae5-b22b-46fb-8e1b-448770d53b55/gejomuparab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9fdaeb-24de-4724-b0d9-dfa6f0769759/orang-orang_biasa_andrea_hirata_download.pdfIn PDF document text
    • http://natetusiwuwo.pbworks.com/f/85847974857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc1a8b5-e7aa-4d51-9b9a-4b3d8427f78f/polymorph_vs_true_polymorph.pdfIn PDF document text
    • http://rixepal.pbworks.com/w/file/fetch/144812949/website_project_proposal_template_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32597d21-f1c7-4008-bdb6-3e7ec307d437/how_to_teach_literature_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f65e8677-e86a-45da-831d-9518e3d8f11b/samsung_s4_mini_price_in_india_flipkart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d27c637-1c15-46ed-83b2-9aa3f227d02c/gabija.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/f/what_is_the_molecular_geometry_of_h2s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ec32c1-57f4-48b1-8682-e6a7032c6ebd/advanced_dungeons_and_dragons_2nd_edition_complete_set_of_26_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2234dd-435c-4b38-ba80-6da346e2a3b2/94183693367.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 5308 bytes
SHA-256: daeb5d8cca28775de8fbb76bab8d392649024f175a66dd82771904aa44e008a7
font_01_sfnt_off000118d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D1 13444 bytes
SHA-256: a74513a38db8308d52b2cf875634e03c075a020f55390dd98183a0949687c733
font_02_sfnt_off00014390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14390 16280 bytes
SHA-256: 42703d100c335f9ecc71d9c93f026752dad95aa6f795655ac0f3fb3232478728