Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ff3077cd22bb5e…

MALICIOUS

PDF

82.8 KB Created: 2021-03-21 12:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41dc263ef55f240db1eb3da3cef90e20 SHA-1: d79352ac3f110f691e3a5ade93c5cc81998cd4e1 SHA-256: 51ff3077cd22bb5e0eb273aac57e8e4e8a3565b78fd3fe3e9c3490dfc026c43d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when clicked, leads to a phishing page disguised as information about car maintenance. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest a phishing lure, likely intended to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/strik?utm_term=2007+jetta+transmission+fluid+change+cost
    • https://cdn.sqhk.co/ruvatagukas/gcid3By/snoop_dogg_s_rap_empire_apk.pdf
    • http://pepirizibizedel.22web.org/afsar_full_movie_720p_hd.pdf
    • http://sosuwede.iblogger.org/36022269859.pdf
    • https://cdn.sqhk.co/nomelafu/jbja0N2/pc_games_download_for_windows_10_offline_exe.pdf
    • https://cdn.sqhk.co/suwezuzifu/jdihrgj/carriage_kia_in_gainesville.pdf
    • https://cdn.sqhk.co/finulepaf/DNjfjgD/arkadelphia_arkansas_weather_10_day.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tagugatukosag.epizy.com/57765743357.pdf
    • https://s3.amazonaws.com/jemisajoda/semi_block_style_business_letter_format_sample.pdf
    • http://xoxadexol.rf.gd/37761818616.pdf
    • http://fafanuzumamowaz.epizy.com/world_religion_and_belief_system_book.pdf
    • https://uploads.strikinglycdn.com/files/afe93eb2-7273-408e-b32e-a77832e3e9eb/market_marketing_plan_definition_and_examples.pdf
    • http://zotogujerovod.rf.gd/98242871635.pdf
    • http://zedoliwitimevaf.epizy.com/the_game_plan_full_movie_download_in_hindi_720p.pdf
    • https://uploads.strikinglycdn.com/files/9b46c662-62f2-4c30-a707-a9049fca3808/best_large_print_crossword_puzzle_books_for_seniors.pdf
    • http://wesonujojamoga.epizy.com/darkshore_classic_guide.pdf
    • https://uploads.strikinglycdn.com/files/2586ccab-f0cd-48a4-9cc9-48f39534e032/memije.pdf
    • http://gakelapirafit.epizy.com/volakefikeketuwalozagi.pdf
    • https://uploads.strikinglycdn.com/files/b16a2a23-9a15-4577-bbb3-546b7f1574b7/the_boy_in_the_striped_pajamas_full_movie_online.pdf
    • http://pekurixapomasil.epizy.com/cissp_cbk_fifth_edition.pdf
    • https://uploads.strikinglycdn.com/files/79800dab-3d3b-453d-bbe6-d37a0f051b3c/lg_refrigerator_service_centre_bangalore_contact_number.pdf
    • https://s3.amazonaws.com/rekorewexidiwo/kopana.pdf
    • https://s3.amazonaws.com/bidurudilidujug/cinema_21_film_teman_tapi_menikah.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/51339609921.pdf
    • http://muwatuvefe.rf.gd/baseball_pig_ms.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_off0000f7da.bin
3a892d4d9948e7cf2fd13ccfff93213ba424d6cf2c2d23b239ece748bd78841e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 5652 bytes
font_01_sfnt_off00010adc.bin
839a306ad6b14c43ed06a8a75be776bf0a126e5002414b316630d8c715ad574c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADC 10532 bytes
font_02_sfnt_off00012eff.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFF 4324 bytes

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