Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ad27a9d7a8f7d4…

MALICIOUS

PDF

77.8 KB Created: 2021-04-06 04:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1c8d3bf3ce67790e9a6d1b7fab7c6629 SHA-1: 371c9aac6a7315260d8e9f93a6e13e5ebd9d1783 SHA-256: e2ad27a9d7a8f7d4305f49834b0d4b064108b2d663dcde7e7cbc8a07fe96f4b0
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 0.9991

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://pelibifir.ru/award?keyword=pdf+to+autocad+2020+converter PDF link annotation
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/balawigapibetaxomemen.pdfIn PDF document text
    • http://leree6.club/583028003ouo8y.pdfIn PDF document text
    • http://italiahot.fun/39_bcs_result_2020hpz9k.pdfIn PDF document text
    • http://4kuhd.me/what_does_bible_say_about_submissive_wifeuvgy8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_60623e2656f4a.pdfIn PDF document text
    • https://dorijalasenotom.weebly.com/uploads/1/3/5/3/135327318/xopodilodufojot.pdfIn PDF document text
    • https://nenawopoweso.weebly.com/uploads/1/3/1/4/131406478/75638f509a4f3.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/67439609624.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/775189241.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/52490534980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470040/normal_5fd34981a9523.pdfIn PDF document text
    • http://vostokzapad.su/74849755599sq0ae.pdfIn PDF document text
    • https://dikubudekoguzo.weebly.com/uploads/1/3/1/8/131857294/4175681.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/orca_quantum_chemistry_program_download.pdfIn PDF document text
    • https://dazowuxope.weebly.com/uploads/1/3/4/3/134319454/rimumexi-beruludax-kevobipe-gewemaxuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e9212a-2de9-4d2e-80f5-e42662f91839/brother_hl_2170w_wireless_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9d96c53-1c9d-429d-8fd1-0f0d7c64cdda/fubaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/134231af-a6b0-4cf3-a293-687d731857d3/1491_new_revelations_of_the_americas_before_columbus.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/sound_of_silence_sheet_music_free.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/39204423814.pdfIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/kw_to_amps_conversion_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505e28ea-0990-4ebc-8d7e-2f0b4c4a418a/what_is_a_good_hyperbole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d64130e-d2ad-4ad5-89bf-b947bdb1f322/41364967556.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_off0000f310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF310 5140 bytes
SHA-256: b452eb1ebf9a1ebbebe902cce6c72c7b02f88fce60d2b6f27f5aed7d31375743
font_01_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 11000 bytes
SHA-256: 92fceda842d91785d9e7351354df0c0856afc779770a0cbad8afd26d566fcf0f

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