Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0766fcae60ea60f…

MALICIOUS

PDF

78.8 KB Created: 2021-03-22 05:01:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 298f12cf3c153966c50628cd027bc7df SHA-1: fc0574180e256ad276bc336dac2714e6200dd127 SHA-256: e0766fcae60ea60faa0280cd6202536d7a0550c84b1933d0e47fc601f6aa6a6d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://bologen.ru/strik?utm_term=hp+envy+4500+scan+problems PDF link annotation
    • http://sunepoxuvigos.66ghz.com/40539593674.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/desafo_del_amor_para_padres_gratis.pdfIn PDF document text
    • http://lutikewoduwafev.iblogger.org/wugitofekoxige.pdfIn PDF document text
    • http://sozisogu.iblogger.org/watiraradejow.pdfIn PDF document text
    • http://novoruxove.iblogger.org/data_science_and_big_data_analytics_emc_free_download.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/spherical_bessel_function.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/asus_4g-ac68u_hard_reset.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5ff654d9b9762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_6050f5664df1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jominata.rf.gd/80759856345.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/dolphin_emulator_games_roms.pdfIn PDF document text
    • http://kuviwobabevi.epizy.com/pefevazutulojuratunilifoz.pdfIn PDF document text
    • http://tujufevowupise.epizy.com/nudunurijixob.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/asda_king_size_bed_sheets.pdfIn PDF document text
    • http://rokabimokow.rf.gd/elementary_introduction_to_statistical_learning_theory.pdfIn PDF document text
    • http://vavikanepib.rf.gd/bette_davis_eyes_chords.pdfIn PDF document text
    • http://zitegarapopufis.rf.gd/lenemarojej.pdfIn PDF document text
    • http://sebilazog.rf.gd/93580365843.pdfIn PDF document text
    • http://dodavofonov.rf.gd/how_to_differentiate_between_bacterial_and_viral_tonsillitis.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/bhajan_dj_song_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/4580469686.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_off0000f6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EE 5696 bytes
SHA-256: b1e6055975ab095b14d01f4234e03ca7a06b32ecb93cc6491fe61374b447c4aa
font_01_sfnt_off00010a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 10500 bytes
SHA-256: cd3e0ebbd1e91a96550997aeb4e4e0932a6a5e126acd3888e343baffafc3361a

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