Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fcd159772bf1e6f…

MALICIOUS

PDF

74.8 KB Created: 2021-06-01 01:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42f2135a7ecadb8fcee42444f6eb4d7e SHA-1: 19a71b508816165077962d023a81f4712b31ce2b SHA-256: 7fcd159772bf1e6f51252e345541b8fc34d31d1463823a801e8f96c4f8fd9b65
104 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. The embedded URL 'https://coretry.ru/pbw?utm_term=netflix+combo+list' suggests a phishing attempt, likely related to credential harvesting for services like Netflix. The presence of a 'download button' heuristic further supports a phishing or malware delivery lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/pbw?utm_term=netflix+combo+list
    • https://cdn-cms.f-static.net/uploads/4475194/normal_603a97ae3e7ae.pdf
    • https://static.s123-cdn-static.com/uploads/4461509/normal_6004eb7fb7e92.pdf
    • https://cdn-cms.f-static.net/uploads/4384471/normal_603a85e18f7d6.pdf
    • https://cdn-cms.f-static.net/uploads/4454306/normal_6061178f4babe.pdf
    • https://static.s123-cdn-static-d.com/uploads/4384164/normal_60b55a57bc784.pdf
    • https://cdn-cms.f-static.net/uploads/4482863/normal_605faef2d265b.pdf
    • https://static.s123-cdn-static.com/uploads/4375353/normal_5ff7f025458dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/06394ceb-2525-4b91-93b5-866df055fa22/anupam_typing_book_free_download.pdf
    • https://uploads.strikinglycdn.com/files/bc56dc6f-3eda-4d01-989b-896a007c897d/forza_horizon_2_pc_download_free_full_version_kickass.pdf
    • http://viluxese.pbworks.com/w/file/fetch/144428688/razudad.pdf
    • https://uploads.strikinglycdn.com/files/05c32d53-a69a-4ed1-ab7d-4fd38f52b85a/funny_glasses_quotes.pdf
    • http://mumubib.pbworks.com/f/mijokosimimurako.pdf
    • https://uploads.strikinglycdn.com/files/49d5cd5b-4886-4a06-a846-61559dd82589/how_many_books_are_in_a_shade_of_vampire_series.pdf
    • http://wuranosa.pbworks.com/f/how_to_consolidate_data_from_multiple_workbooks_in_excel_using_vba.pdf
    • http://vowujepojez.pbworks.com/f/plants_vs_zombies_2_free_download_for_android_mob.org.pdf
    • https://uploads.strikinglycdn.com/files/7f16643e-a72a-46ab-aaf0-1ef84b81c4c4/are_hyundai_pressure_washers_any_good.pdf
    • https://uploads.strikinglycdn.com/files/2234fbb4-0f93-4eb1-b0a6-d9734cd61bcf/81528435478.pdf
    • https://uploads.strikinglycdn.com/files/cd2d4503-c4fe-4f60-afbd-ac3b1a5f49e6/residential_construction_inspection_checklist.pdf
    • https://uploads.strikinglycdn.com/files/281f062c-d67c-4e30-aa61-cc2365c8af08/risir.pdf
    • http://visetululiv.pbworks.com/w/file/fetch/144415248/star_wars_jedi_academy_no_cd_patch.pdf
    • http://nikekuva.pbworks.com/f/how_to_setup_a_sharp_alarm_clock.pdf
    • http://wuwazilizos.pbworks.com/w/file/fetch/144425397/presidents_choice_5_cup_coffee_maker_manual.pdf
    • https://uploads.strikinglycdn.com/files/d0d01108-f53f-4c77-b52d-e35a7c007054/tesovufof.pdf
    • https://uploads.strikinglycdn.com/files/8b821266-b19e-401c-b887-640183729a97/nespresso_by_delonghi_lattissima_one_en500bw_coffee_machine_review.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d209.bin
90ca718731c485c53cc2ba8f5f6785a7ec39e2c477a874a1540efb1b1db0c0de
pdf-font-stream PDF embedded font (sfnt) at offset 0xD209 4896 bytes
font_01_sfnt_off0000e2b8.bin
99de3bffab9a204c59f60cc1f26f9244c0f9c0384d880f77b99abe3d3f6cef50
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B8 11252 bytes
font_02_sfnt_off0001079b.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
pdf-font-stream PDF embedded font (sfnt) at offset 0x1079B 16312 bytes