Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f84a44bd9d056e…

MALICIOUS

PDF

86.8 KB Created: 2021-06-03 03:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 64d405fe3e3afeba6f73608fc0cfd699 SHA-1: 5269dd1a452df1dd80722dfb28b5d35539fb51df SHA-256: 09f84a44bd9d056e90d2e93df21fa456f0e7a13aa63142ecf02b52382dc8c022
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 0.9992

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://crewmak.ru/pbw?utm_term=reaccion+quimica+de+sustitucion+doble+ejemplos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371799/normal_602732d7e7086.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387918/normal_5fcc5563d308f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5fdeefba848fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_6006011dbe0f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492250/normal_6050e84078a68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415527/normal_6008e6fd84921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459036/normal_6061308fb44f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_60338d99407bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_604dd43531840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://finebov.pbworks.com/f/how_to_add_money_to_turbo_prepaid_card.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/f/vegelunibetavozipusi.pdfIn PDF document text
    • http://lexibitite.pbworks.com/f/fazefakedevewasixedir.pdfIn PDF document text
    • http://zixereves.pbworks.com/w/file/fetch/144533442/kosolopovogos.pdfIn PDF document text
    • http://finatin.pbworks.com/w/file/fetch/144501315/kajexefu.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/hepa_filter_integrity_test_pao.pdfIn PDF document text
    • http://zuwofig.pbworks.com/w/file/fetch/144532995/is_fortnite_free_on_pc_2020.pdfIn PDF document text
    • http://gatunam.pbworks.com/f/como_descargar_clash_royale_para_pc_windows_7.pdfIn PDF document text
    • http://biduzoku.pbworks.com/f/what_is_the_best_summary_of_the_line_in_bold_the_gettysburg_address.pdfIn PDF document text
    • http://katafuzum.pbworks.com/f/35016741313.pdfIn PDF document text
    • http://lulatigono.pbworks.com/w/file/fetch/144534936/english_idioms_and_phrases_with_meanings_and_examples.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/download_vocal_remover_pro_apk.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144421194/mpk_mini_editor_download_mac.pdfIn PDF document text
    • http://javefanudosa.pbworks.com/w/file/fetch/144501849/6666402927.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001032a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 5352 bytes
SHA-256: 2d57baa06304dd9b2eb08b44b240e07bffe9bac01c72711fd4ac877dd5555987
font_01_sfnt_off0001153e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153E 12340 bytes
SHA-256: 73c3c102f7b8cd84288504174d59b9b7fa455dffa1b695e2c9f201078515dbb5
font_02_sfnt_off00013d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D90 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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