Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ee8a6520a2786d…

MALICIOUS

PDF

94.1 KB Created: 2021-05-05 16:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bfda88485cca9adbfa29f9dd8ad39eb3 SHA-1: 0aeca272028308e193f090265b2080bcd2916ca4 SHA-256: c0ee8a6520a2786dbe77065690c18fc6d030971bc02948f3f67ea67de0ec21dc
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, suggests a lure related to software downloads. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/strik?utm_term=autocad+2016+3d+tutorial+pdf+free+download PDF link annotation
    • http://bofejaxo.iblogger.org/android_google_play_services_keeps_crashing.pdfIn PDF document text
    • http://pribor-poverka.site/phpspreadsheet_convert_csv_to_xlsxlpown.pdfIn PDF document text
    • http://coins24h.com/253374616248r82t.pdfIn PDF document text
    • http://regetun.22web.org/79969842509.pdfIn PDF document text
    • http://espaceabonnes.com/60249600390xa0wo.pdfIn PDF document text
    • http://3gusevshop.website/275856916246skf7.pdfIn PDF document text
    • http://bettermoneytips.com/xigobegowodigeorpjd.pdfIn PDF document text
    • http://gibipimaxadebip.iblogger.org/autocad_commands_download.pdfIn PDF document text
    • http://nutristrike-shop.ru/solutions_shampoo_by_great_clips_reviewsm5t1q.pdfIn PDF document text
    • http://petersikdar.com/631566010602w177.pdfIn PDF document text
    • http://tejajugumoneton.66ghz.com/at_t_international_dialing_guide.pdfIn PDF document text
    • http://apelsins.space/muwijo9ssst.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laganomezavarof.epizy.com/sirijipaserafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e5b8c4-c03b-4bbb-a133-0fc33bf07932/9398174913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98af142-1f31-45b3-9087-3c8219bdafcf/79846911170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c228c6-a366-49f4-b1dd-c831458372a9/troy_bilt_lawn_mower_oil_lowes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8fd9efc-0335-44bf-aafb-1ca7c00c6196/uscg_medical_waiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f79cd1f-8cae-4e1c-8f25-fe6ea8c177ca/a_sample_candle_making_business_plan_template.pdfIn PDF document text
    • http://xonefepuvimami.epizy.com/trumpet_euphonium_duet_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f0dfa9-7503-4c08-bdfe-9431c0a80edf/how_to_say_hi_in_mandarin_chinese.pdfIn PDF document text
    • http://nenidexixod.epizy.com/sosujewefow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/635dceaa-1eb5-4d9c-abac-16b56e8314b3/french_english_online_translation_dictionary_lexilogos.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8B 5696 bytes
SHA-256: dba4e464b15fb4ad1e22b08508fbdd5d9795c1df2e351c50175c22548f1efbb0
font_01_sfnt_off0001431c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1431C 11628 bytes
SHA-256: 6829d4b8c39996333d77a42dcd0cbb78f8efc36cfbf284618d5579ed42dba91a

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