Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60121352ac3d508…

MALICIOUS

PDF

88.7 KB Created: 2021-03-10 21:22:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ca19837c14773297dfc8cd9086f24bdc SHA-1: 089911de67fdf7444e1ae9193a299d1cc18458c5 SHA-256: d60121352ac3d508242b8c623f5805fa3e653b408be4be55f6508ae062fc8a3c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's content, despite being heavily obfuscated, appears to be a lure, possibly related to a business agreement, to entice users to click on the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://dafemum.ru/123?utm_term=joint+venture+agreement+template+philippines In PDF document text
    • https://cdn.sqhk.co/reriwoduriju/WLggRSy/olosho_numbers_in_ibadan.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoroxur/ejdhfjd/bupulomo.pdfIn PDF document text
    • http://reduslim-sitoufficiale.site/339196925192jd55.pdfIn PDF document text
    • http://roboludawu.mywebcommunity.org/gifagixibivazibigojasi.pdfIn PDF document text
    • https://cdn.sqhk.co/togareguko/6kfJdlg/temple_run_online_2.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/ifggjbL/fiwaduvewodizukigemedi.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/dtyjajj/cotton_classing_hvi.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/ib2oUid/www_dictionary_english_to_spanish_translate.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/YzLqjhc/metaphysics_books_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/YgfMhdv/dezaxives.pdfIn PDF document text
    • https://cdn.sqhk.co/wafexumu/cHjd6he/stranded_without_a_phone_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/zitajazasu/GhcXKjb/break_the_glass_game.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/why_does_my_kitchen_faucet_leak_at_the_base.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/ghgibjj/xafirutalowibidak.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/hcxShcp/espn_97._5_houston_lineup.pdfIn PDF document text
    • http://puralivivupose.iblogger.org/dowolefapumofamivenet.pdfIn PDF document text
    • https://cdn.sqhk.co/vivutazawi/h0iaHhg/82519534314.pdfIn PDF document text
    • http://in-step.shop/la_santa_biblia_hablada_salmo_911ozb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nutimuratibuzur.epizy.com/jorazepupanoja.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/which_printer_is_best_for_home_use_laser_or_inkjet_in_india.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/dewalt_brushless_drill_combo_kit.pdfIn PDF document text
    • http://pamapubosozule.epizy.com/74054130773.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_off00011f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3D 5280 bytes
SHA-256: 78dd9d39f8125ea13c83bd12ef7f325a66b20bf49f333448b4a5fcc4ae4ede68
font_01_sfnt_off0001310e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310E 10540 bytes
SHA-256: f7a50c799a3b0fb7ca6b6d366c42095a695a090a6e002b3352b4719388761402