Malicious PDF — malware analysis report

Static analysis result for SHA-256 457208c6f77cde89…

MALICIOUS

PDF

93.9 KB Created: 2021-03-14 00:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a66534a639e5b8e30a362da31efe201 SHA-1: 3a89872af9454cafed95fc077be65eb7b920873a SHA-256: 457208c6f77cde89bf462dcde9294b32a21a3e03838ecd9ad70fdca2cf5cab17
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 0.9990

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://zajinet.ru/wix?keyword=kobalt+10+dual+bevel+sliding+miter+saw+manual PDF link annotation
    • http://svarka-aurora.online/samsung_tv_bluetooth_keyboard_not_working2mve6.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/bob_proctor_paradigm_shift_workbook.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/giAjaF2/75311299156.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/EhhfIgo/secure_settings_pro_license_key.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/zokozejitororufelag.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/oyheLhj/zajuwubiliwozazuze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469640/normal_5ff0c98ea677e.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/nagudagepidigi.pdfIn PDF document text
    • http://maska-respirator.shop/solving_systems_of_equations_by_substitution_word_problems_worksheet_answers8wvhh.pdfIn PDF document text
    • http://topcreditcheck.info/youtube_the_watsons_go_to_birmingham_chapter_12lp2mr.pdfIn PDF document text
    • https://cdn.sqhk.co/sowotewope/tmjbTza/autodesk_revit_architecture_2014_student.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/hTl1fdj/who_can_duet_with_me_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/Ahe3ibJ/counter_terrorist_financing_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/Pjhxhf3/gupedajovogokazibopujip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457281/normal_600a3ceb9777b.pdfIn PDF document text
    • http://lngcliente.com/10710956359ne2d7.pdfIn PDF document text
    • http://rixugogalide.22web.org/bejelazolojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5fd9d840c58a7.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/gfYGTOd/beautiful_wallpapers_for_laptop_full_screen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kebanibaru.epizy.com/bekurezufumezivinowofulu.pdfIn PDF document text
    • http://kadizovol.rf.gd/kipewomele.pdfIn PDF document text
    • http://posugez.epizy.com/fundamentals_of_technical_communication_skills.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/93618548729.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001217b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217B 5600 bytes
SHA-256: 68ef5c728b91f7a7936f5c022dba2723a58141cbb257c15ff5d46f0c752e8303
font_01_sfnt_off00013482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13482 2212 bytes
SHA-256: d03e7d22675cf3b67b3e8a5ed09afaf3494735d40243762bb4f0f368ec391e88
font_02_sfnt_off00013e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E18 12508 bytes
SHA-256: 8329fe93e148b270f6e99d15eadfad7ba6620d47f3f5e28c40b3c4c35ac31d25

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