Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc8291a53af2494…

MALICIOUS

PDF

74.2 KB Created: 2021-02-19 07:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 07d1e930039554c10180a4be7a14ec2b SHA-1: d935b42417f4af1726e96ac62a19e98628028e98 SHA-256: dfc8291a53af249475b1a0ac8ec1b8976e7e405912bebc34624a0e037b644eec
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://yafferge.ru/aws?utm_term=matematica+financiera+que+es+valor+actual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5fdc44e412972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464862/normal_5fdea0309fe7d.pdfIn PDF document text
    • https://cdn.sqhk.co/winexajis/jggiBgj/62013339113.pdfIn PDF document text
    • http://dalkomis.website/bonjour_butane_torch_manualjd2gk.pdfIn PDF document text
    • https://cdn.sqhk.co/pidenali/hbhbGji/health_food_and_nutrition_articles.pdfIn PDF document text
    • http://gimerixifaxet.iblogger.org/free_video_boboiboy_the_movie_2016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5fcd4043ebe06.pdfIn PDF document text
    • https://cdn.sqhk.co/jivapereb/gRhfLof/fun2_2_player_games_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393353/normal_600a22afc43a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_5fe675ddc7fc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_60191e9b106bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6020299ab7306.pdfIn PDF document text
    • http://repair-planshetov.ru/worship_music_sheet_music_freesfbyl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381102/normal_6008099e9f3ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_6018a1e97dfe9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karifopiti.epizy.com/aiou_admission_form_autumn_2019_last_date.pdfIn PDF document text
    • http://sarebabeb.epizy.com/jedunixalebabulojileg.pdfIn PDF document text
    • http://pekufupudemolor.epizy.com/suffix_worksheets_for_grade_5.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_off0000e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 5216 bytes
SHA-256: c408bf1bb7ce7ad4a77fd639076f6dd6ccfad1569f85e19411b41de4b6eb756d
font_01_sfnt_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 12188 bytes
SHA-256: c71b56e9beaedeee7f2be54fd3ae4ba13191fbe7dce382ec3147b8d68f67becf

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