Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02e8d28e3b30503…

MALICIOUS

PDF

75.7 KB Created: 2021-03-19 13:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 26f92239bfcb3224504c9186f205f62b SHA-1: 5b3be2a2802309d1acb34e3fa50331e1a9e37f82 SHA-256: e02e8d28e3b305034bae847b1aff1530c82092d529a66382e87991dbbc0cab5c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm on disposable hosting. The embedded URL points to a domain that is likely used for distributing malicious content or phishing. The PDF structure and heuristics suggest it is designed to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/award?keyword=negative+prefixes+advanced+exercises+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488315/normal_601256719948d.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/mewananapod.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/nisamilubinekumuzezise.pdfIn PDF document text
    • http://xonajolonifimo.22web.org/simple_iq_test_questions_with_answers.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/95287919636.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/armour_of_god_daily_prayerfc63z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_6049e06d60452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417992/normal_604b68ef79ede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484818/normal_5fe0614173c1d.pdfIn PDF document text
    • http://beststudent.space/wozosuketfrqoh.pdfIn PDF document text
    • http://legendnat.space/84563704589oi6ag.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/gufovudabawewotudozawen.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/what_cars_are_redesigned_for_2021.pdfIn PDF document text
    • http://spainwow.pro/sorting_3d_shapes_venn_diagram_worksheet_ks1j7cx9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satogitexuvo.myartsonline.com/chartered_financial_analyst.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/90922820949.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/98706930207.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/upsc_ias_online_form_2020_date.pdfIn PDF document text
    • http://dadojusox.epizy.com/bhojpuri_fim_bandhan_movie_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/ascaris_lumbricoides_treatment.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/honda_cbr600rr_2007_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/febotuluwapapef.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/1414424551.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/lijudapa.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_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 5388 bytes
SHA-256: 261bb6be3ca91a6f80b64202fd80db6d88eab8b65345d882d3c76d64a47af58c
font_01_sfnt_off0000fc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC40 10920 bytes
SHA-256: a953e49c813a5f39d9fd86b93f24cbb644ab251b193b1b8c8f935a10c5c48895

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