Malicious PDF — malware analysis report

Static analysis result for SHA-256 e308a70589d8bca4…

MALICIOUS

PDF

82.0 KB Created: 2021-05-16 18:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1d6ff7dd393b877ae5446d7272a5d167 SHA-1: 19b8593111a44b7798ef82b07616f1991ffddadb SHA-256: e308a70589d8bca460dfceaf802baecb24fa73bddc4d285c61aaee3ddc082cd6
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=lg+7kg+washing+machine+user+manual PDF link annotation
    • http://xteenware.online/madden_mobile_free_coins_no_survey_nh44xs.pdfIn PDF document text
    • http://titanovyi-filtr.ru/3538998094900sud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467038/normal_606e63930d498.pdfIn PDF document text
    • http://cancandance.org/bipoxufemikibivg27a4.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/A3jjDih/rekatokuvatepisar.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/92566430125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_6016fbeae86a0.pdfIn PDF document text
    • http://pidijajuwupurop.medianewsonline.com/introduction_to_ruby_programming_language.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/black_panther_film_script.pdfIn PDF document text
    • http://predouche.xyz/law_cet_books_in_marathi_free_download3rpq1.pdfIn PDF document text
    • http://the-glow.ru/89689796604tkt3x.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/gi2VbDu/97230927562.pdfIn PDF document text
    • http://simkosa.website/avery_address_labels_template_51678q89q.pdfIn PDF document text
    • http://optarfes.com/o_que_e_seo_marketing_digitalncghb.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/36867628155.pdfIn PDF document text
    • http://pewujok.mypressonline.com/al_fajr_watch_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_600db36c180c0.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/jZAutG9/tulebaxakiwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5ff153fcf2e01.pdfIn PDF document text
    • http://bukawavado.medianewsonline.com/binge_eating_disorder_screen.pdfIn PDF document text
    • http://osmosiotzs.fun/bls_2015_guidelinesp8kho.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kagijido.myartsonline.com/acuerdo_de_paris_sobre_el_cambio_climatico_2020.pdfIn PDF document text
    • http://vowojuxibaxo.myartsonline.com/86641214864.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/xamagufolugija.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_off0000f55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55B 5084 bytes
SHA-256: edfe0724f863eb3b0885d4ffc1d0906c4aa22d80372d0fa866662e3072c869d5
font_01_sfnt_off0001067f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067F 10960 bytes
SHA-256: dafc59c742f4644d533a398d075877b7eda44de296e45ba98c26134cbcd9e106
font_02_sfnt_off00012c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C07 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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