Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f1d3d64c66b52a…

MALICIOUS

PDF

78.0 KB Created: 2021-02-20 08:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ed56d2758c2ae8099430b332b2c0b069 SHA-1: dcf42b110884a8f55a2b5893b518ce1c4bf44171 SHA-256: c3f1d3d64c66b52aa52142512986d1bcb18f0a3d019a1927be54e6de2157dc78
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=is+breville+air+fryer+good PDF link annotation
    • http://gewebud.22web.org/chahat_ek_nasha_song.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/gd2Kwgj/6828256274.pdfIn PDF document text
    • http://butijimixuf.iblogger.org/cadet_college_murree_admission_form_2018.pdfIn PDF document text
    • http://fadekitexef.iblogger.org/95122700704.pdfIn PDF document text
    • https://cdn.sqhk.co/mipemoku/jxheMv7/screen_recorder_with_audio_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/ekjeiis/issa_22_pew_pew_pew_gif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://papawipowujujed.rf.gd/wevowemosozepuwofan.pdfIn PDF document text
    • http://lovopezabima.epizy.com/computer_awareness_mcqs_book_free.pdfIn PDF document text
    • http://furarojakak.epizy.com/54426477484.pdfIn PDF document text
    • http://gosewobagoxubok.rf.gd/anbe_peranbu_video_song_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/sugar_skull_coloring_page.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/delete_app_search_history_android.pdfIn PDF document text
    • http://tugojolowok.epizy.com/zexila.pdfIn PDF document text
    • http://puteruwegadijem.epizy.com/food_that_fell_from_heaven_crossword_answer.pdfIn PDF document text
    • http://fozoxorosemaxo.epizy.com/kahoot_correct_answer_bot.pdfIn PDF document text
    • http://gedesopow.rf.gd/75737317503.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/35892095685.pdfIn PDF document text
    • http://jatuxijor.epizy.com/kanye_west_runaway_piano_sheet.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_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 5316 bytes
SHA-256: 78b28ef5dc2a593b2b452918494edec381ad8ce99d8b4ab6a45a64e96f8f5a0b
font_01_sfnt_off00010646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10646 10788 bytes
SHA-256: 8c7d9e1b41f094dbab41393dbc51058aff287bcee223051edced5a29d784900f

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