Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ebf7731f3554cb…

MALICIOUS

PDF

79.9 KB Created: 2021-03-29 00:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c65017a0e9608c18ee581f30e2c9aa7f SHA-1: 5bc04aa2ec13e0dc75a784fa16fe13b0224a59b9 SHA-256: 77ebf7731f3554cbedb09ad2a4d6b37d6fef3a9fa7c60be97f3bbd6fe2355d55
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/aws?utm_term=maravilloso+desastre+sinopsis+libro PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370319/normal_5ff918d76eccc.pdfIn PDF document text
    • https://baxopaparoxiw.weebly.com/uploads/1/3/1/4/131454316/7415587.pdfIn PDF document text
    • https://cdn.sqhk.co/jobolekul/ijgh9jh/34788445946.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/gP35ja9/oxygen_tank_sizes_for_torch.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/iFijYif/missing_children_found_years_later.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/pjhhcgd/how_to_anonymously_report_child_neglect.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/6754653.pdfIn PDF document text
    • https://dudunubute.weebly.com/uploads/1/3/4/1/134132035/cb0c6aaea78d61.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/hiB5jgf/fernanfloo_saw_game_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/dCTgcgi/planetary_conquest_star_wars_rebellion.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/Y56hgMM/xbox_one_series_x_games.pdfIn PDF document text
    • https://cdn.sqhk.co/gobikazifelo/JduegcM/passive_voice_lessons.pdfIn PDF document text
    • https://cdn.sqhk.co/degawatoze/y4ielhi/jutoxisutifima.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/jcSicIC/samsung_gallery_web_login.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/OuhbheQ/buzexarazexosoparimad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_600356eeb293f.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/ddsiajd/97940364913.pdfIn PDF document text
    • https://cdn.sqhk.co/gabironero/id5jdgh/bubble_pet_feeder.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/what_are_covid_19_regulations.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/brainly_answers_maths.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/dell_xps_8300_drivers_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/88157475170.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_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 5160 bytes
SHA-256: cb2b147790c9bdad31da12a4ea58aa4ecdd409cca6fdad3bf1a3fc9e5c076ff3
font_01_sfnt_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 12400 bytes
SHA-256: 3235a1247cb1672bc53cc586e8d7afcdd1efe24c4c2a6860f7ac02a82cdbc819

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