Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dfe00ece127eb91…

MALICIOUS

PDF

80.3 KB Created: 2021-06-05 22:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd69b9c6c176caeeb3a25008da2d8f25 SHA-1: 73113322eb0c0cf484a55cb8a4e7465dad2d8562 SHA-256: 5dfe00ece127eb910a27117d47754905e41b5e51d321084fdd3839ed246f7788
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 0.9994

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://wastran.ru/pbw?utm_term=how+to+create+a+planner+template PDF link annotation
    • https://motodamoz.weebly.com/uploads/1/3/1/4/131452818/xakogetuku_moxizaxesadesun.pdfIn PDF document text
    • https://wepuporo.weebly.com/uploads/1/3/2/7/132741302/ec826b.pdfIn PDF document text
    • https://wutusubefesuw.weebly.com/uploads/1/3/5/9/135961291/pibami.pdfIn PDF document text
    • https://sewokowoxukipa.weebly.com/uploads/1/3/4/8/134846336/lipenajane.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bemulopawed.pbworks.com/w/file/fetch/144442845/freeman_dyson_libros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92539528-6cb2-4925-8a8f-f500a5b17774/87234005676.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/19575290411.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/can_walmart_return_without_receipt.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/88128310229.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/reading_inca_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ca74a5-aefd-474c-bbc0-b37c64b71393/minn_kota_terrova_80_us2_i-pilot_24v_80lb_60.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144420921/how_long_is_the_osha_10_test.pdfIn PDF document text
    • http://xujefix.pbworks.com/w/file/fetch/144576642/how_to_download_music_without_spotify_premium.pdfIn PDF document text
    • http://zufogopojut.pbworks.com/w/file/fetch/144596487/how_do_you_write_2_hundredths_as_a_decimal.pdfIn PDF document text
    • http://nukuxim.pbworks.com/f/padujowakijevotizudufu.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144638130/how_to_test_samsung_defrost_sensor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f0476d-634f-4db9-ac6d-a8691ddb3e8b/52929324968.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/f/internship_certificate_letter_sample_doc.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144435807/jikige.pdfIn PDF document text
    • http://xetuduju.pbworks.com/f/what_is_a_mini_dapple_dachshund.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/shadow_fight_2_mod_apk_titan_weapon.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144629532/xisito.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/how_to_pair_anker_soundcore_life_note_earbuds.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_off0000fdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 4952 bytes
SHA-256: 00cede4959e2bafd8088965268179a29dd8d06592591499d1ad5590c27395e16
font_01_sfnt_off00010ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC1 10760 bytes
SHA-256: 62a2d9bf3f5f5ab68ac4b3ab3df35cacc561c25cdb68b6e228fb373ed13d5ab6

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