Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdabfad7db6466d8…

MALICIOUS

PDF

75.9 KB Created: 2021-06-10 21:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d78af63ed37e052e9040606ec2a76c97 SHA-1: 0a14dc097adfd9fee8d979e0d525332e7799af67 SHA-256: fdabfad7db6466d8b26b8b1d56f2149bc39fc01a57aa52fde1db800d0dfef070
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many pointing to link farms hosted on disposable domains, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://irlanc.ru/pbw?utm_term=best+abstract+for+research+paper PDF link annotation
    • https://wasoxojeroxinab.weebly.com/uploads/1/3/4/8/134888233/genawod-selasamogex-xusowo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454429/normal_5fcef5929d776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_604db20a4ad44.pdfIn PDF document text
    • https://juvosibizojeguw.weebly.com/uploads/1/3/4/0/134040958/pidefemasos-vipegufupukina-dulejobudum-nifuragerukez.pdfIn PDF document text
    • https://jugozufenuw.weebly.com/uploads/1/3/4/2/134266135/3469308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_606e9db5092fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5fee72faa9056.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404103/normal_5fdfc9c79884b.pdfIn PDF document text
    • https://wigikeketiru.weebly.com/uploads/1/3/1/4/131406435/8ef6d34d84c63d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_60162bffceb5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449397/normal_60bceea445169.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vekunadugaj.pbworks.com/f/dead_trigger_hack_download.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144427362/what_does_inactive_account_mean_on_credit_report.pdfIn PDF document text
    • http://xujefix.pbworks.com/w/file/fetch/144423471/nejemewedagaranil.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/how_to_program_my_universal_remote_to_my_samsung_tv.pdfIn PDF document text
    • http://gabekujijud.pbworks.com/f/312829329.pdfIn PDF document text
    • http://pebolokunaz.pbworks.com/f/free_clash_of_clans_gems_hack_apk_download_for_android.pdfIn PDF document text
    • http://podixarutib.pbworks.com/w/file/fetch/144839466/what_happens_when_your_ruling_planet_is_in_retrograde.pdfIn PDF document text
    • http://zilebunod.pbworks.com/f/5136403933.pdfIn PDF document text
    • http://wenumizelug.pbworks.com/f/windows_10_education_key_generator.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/w/file/fetch/144597693/how_to_end_an_internship_application_letter.pdfIn PDF document text
    • http://sorawako.pbworks.com/w/file/fetch/144968148/jadebabebexizetadupop.pdfIn PDF document text
    • http://nebapelamive.pbworks.com/f/comma_splices_and_fused_sentences_quiz_3_tortoise.pdfIn PDF document text
    • http://guzopisuw.pbworks.com/w/file/fetch/144618654/does_cod_black_ops_cold_war_have_zombies.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/f/pulunavubejatagazuvub.pdfIn PDF document text
    • http://wemilamozede.pbworks.com/f/how_do_i_make_adjusting_journal_entries_in_quickbooks_online.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_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 5260 bytes
SHA-256: 099008f419af49db7fc74eff5f0fd05c3e6aac88ab28575357a383db43d76fa4
font_01_sfnt_off0000fd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD57 10248 bytes
SHA-256: 8dca8165843abfe835f54561e8d49f7c6bf23402b8fd9f40f0f02d087a829f17