Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b16935f1a2a48f…

MALICIOUS

PDF

70.6 KB Created: 2021-02-18 08:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2033eaac5a82f80e1238d043229a66ed SHA-1: 9b5853a616a881bc19f1d5ce05358c9caa1150da SHA-256: 32b16935f1a2a48fa1506937c811d9a2627fc6fcf964d22361b4df3ebc397c95
126 Risk Score

Malware Insights

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

The file is a PDF that contains multiple embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically phishing. The embedded URLs suggest a phishing or scam attempt, likely to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=graphic+design+contract+template+pdf PDF link annotation
    • http://bigchance.pw/wotegesekasasijivijixebokmv3e.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/the_book_thief_study_guideks96q.pdfIn PDF document text
    • http://pusaburuku.22web.org/89639382459.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/jdjfjfo/moduli.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/4qih2vN/52043718153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_602347a5710eb.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/hXhjaSl/best_free_stargazing_app_for_android.pdfIn PDF document text
    • http://amandeepsadyora.com/positive_and_negative_number_line_worksheets95u6g.pdfIn PDF document text
    • http://xozonline.ru/xizadotisavenegeguta1dtny.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499984/normal_6007a7f32f373.pdfIn PDF document text
    • http://filemarker.store/nickelodeon_kart_racers_2ys443.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/ghjOieb/xaluzinunozemijipavu.pdfIn PDF document text
    • http://genusadnlo.space/how_to_reset_a_slingbox_500lodat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/restaurant_management_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/61709947503.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/excel_sheet_abbreviation.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_off0000d8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 5600 bytes
SHA-256: 065880553279363ec8b44b30cfb5c300fce48177f7f91ed8c4d67e4b09524cc4
font_01_sfnt_off0000eb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9D 9952 bytes
SHA-256: 7bd2f909c6dc18e22f65712abd73a4d8c85cd2a09b9b54af27ed37f75f3ac726

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