Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e44eb4dff74b77b…

MALICIOUS

PDF

74.4 KB Created: 2021-06-01 10:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9ae089259ca0890b4f099f77f7d7cb0d SHA-1: 5714cbb084fb3611f28d870c5f32cd1893c2b10c SHA-256: 2e44eb4dff74b77bb8961509172479db8c221e5d19334625367789e9c43e9eb6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://oniceh.ru/pbw?utm_term=benvolio+and+mercutio+are+walking+around+in+a PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459941/normal_5ff889a58c42c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453890/normal_605f54e68b715.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_5fca5f15c744a.pdfIn PDF document text
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/tikedasofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_600e0cd331429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_602958037557d.pdfIn PDF document text
    • https://leladuginaxiwo.weebly.com/uploads/1/3/5/3/135320554/0fc87d.pdfIn PDF document text
    • https://berosafeteroz.weebly.com/uploads/1/3/4/8/134885041/zuxub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461777/normal_5fdab5b6ed333.pdfIn PDF document text
    • https://vuguzunorofina.weebly.com/uploads/1/3/4/3/134322364/kuduvut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416322/normal_5fd06b8df0c1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viluxese.pbworks.com/f/how_to_start_keto_diet_for_free.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144422661/fill_in_missing_numbers_hundreds_chart.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/rapport_de_stage_reception_dhotel.pdfIn PDF document text
    • http://xixokuzujoz.pbworks.com/w/file/fetch/144427233/apex_legends_aimbot_ps4_download.pdfIn PDF document text
    • http://sajateves.pbworks.com/w/file/fetch/144451194/the_crew_2_hidden_cars_locations_map.pdfIn PDF document text
    • http://fevosezew.pbworks.com/f/how_to_study_for_nasm_exam.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/w/file/fetch/144452148/fuburaruzumodivoj.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/f/lanogubolosetugaditivor.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144419808/manual_al_quran_tagging.pdfIn PDF document text
    • http://japomajuxire.pbworks.com/w/file/fetch/144441111/therapeutic_guidelines_oral_and_dental.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/w/file/fetch/144425337/how_to_flash_kindle_fire_hd_3rd_generation.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/60929617948.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_off0000e74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74A 5348 bytes
SHA-256: d6eea79d670e4fcaa6d2c7835aa6e00d2552b5cb53d20a3aeec28895ba78cd61
font_01_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 10088 bytes
SHA-256: 952274af7193878548727c4b47a1ee86c61c67de0dbce2a37b7799b51e7e534a

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