Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb882142cbae6ef…

MALICIOUS

PDF

78.9 KB Created: 2021-03-02 07:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b6a383f57ebacee197f1573094a76f36 SHA-1: 47ea8b2aeaccdf0b0fb1bf09fe1aa0672bc464a7 SHA-256: ebb882142cbae6ef34bb04b39e0154d91a924913b03ba9f3aa3bad26c543e1b7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to suspicious domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, further supporting this assessment. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=introduction+to+language+fromkin+10th+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417990/normal_5fd959ff42ca2.pdfIn PDF document text
    • http://afracheat4.xyz/bowmasters_diamond_membership_hack_apkin8xu.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/philosophy_here_and_now_lewis_vaughncchus.pdfIn PDF document text
    • http://bezprovodov.guru/bedrag_ex_btw_berekenen_formuleqfzep.pdfIn PDF document text
    • http://cashbackmoney.info/place_value_games_for_2nd_grade5m8ox.pdfIn PDF document text
    • http://pek-24.cc/canon_rebel_t3i_specs6kdkt.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/manual_prctico_de_psicoterapia814mg.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/jfHZejg/domestic_electric_fence_wiring_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/KicjhWx/puvasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_60318ae34ce01.pdfIn PDF document text
    • http://kmikaerfs.ru/making_art_form_and_meaning_ebookh5jap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_60333dc09f8c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_603bafca4c802.pdfIn PDF document text
    • https://rudotuvesil.weebly.com/uploads/1/3/5/3/135398110/donopotejeduna-runaluvubom.pdfIn PDF document text
    • http://batmbatm.ru/monopoly_cheaters_game_guideyds55.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/jcEjifg/farming_simulator_16_mobile_download.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/csr_racing_2_tuning_guide_toyota_86i80x5.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/j8Hhgig/emf_detector_radiation_meter_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gorobibo.epizy.com/delta_free_carry_on_bag_size.pdfIn PDF document text
    • http://fuvogixus.epizy.com/subasanitesa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 5584 bytes
SHA-256: aa3f82457b4548475ac32e2c52f87f0414a7a0ff14b3ffb09aad00890e0bed45
font_01_sfnt_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 10708 bytes
SHA-256: bdb9ab252938d7bb74943e47b3bd23769bd5991fc6d1c6cf05bdfe9751919aba
font_02_sfnt_off00011873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11873 16084 bytes
SHA-256: 29b8095464fa9501f2379a4c43ca3ba1b1df604f87f2abcbe11fa9bdafb8ec10

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