Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c1113fa08d71cc…

MALICIOUS

PDF

88.1 KB Created: 2021-03-16 07:17:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e99301ccc83b565415ae23062cc1b923 SHA-1: 731bb87eb576af7d2c796bbfdb91708a0b031c86 SHA-256: 52c1113fa08d71cc90699a2415438c7be1d2a3a7fa84844425a97cbbc0c55baa
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://ponafet.ru/123?utm_term=antivirus+android+samsung+gratuit PDF link annotation
    • http://zosexurotatogek.iblogger.org/the_house_of_the_spirits_1993_watch_online.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/34071676780.pdfIn PDF document text
    • http://2022god.com/how_to_train_your_dragon_4_full_movie_in_english_2019cy2op.pdfIn PDF document text
    • http://tosugev.iblogger.org/search_books_by_isbn.pdfIn PDF document text
    • http://xuwurexem.22web.org/catalogo_sat_2020.pdfIn PDF document text
    • http://d2-club.ru/8251232543729fw0.pdfIn PDF document text
    • http://zasopawemumobaw.iblogger.org/39886114742.pdfIn PDF document text
    • http://monongzhlh.space/vivid_navigation_gestures_apkqfam0.pdfIn PDF document text
    • http://pubggaming.online/39377064413o2rhi.pdfIn PDF document text
    • http://ohota-ribalka.online/idle_train_empire_mod_apk1323d.pdfIn PDF document text
    • http://repochka.site/tecnicas_de_redaccion_parrafo_ejemplo42er4.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/drugi_svetski_rat_knjiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffced8db-293c-41f0-ac70-3e1c466cff21/asi_hablo_zaratustra_libro.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/how_to_remove_splat_hair_color_from_skin.pdfIn PDF document text
    • http://borarujedumamut.epizy.com/29677693812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced07308-bea6-4268-bb08-b13bf3440079/35963461896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdf1ea30-bf24-4ca5-a46f-d4759b14afdc/tosutoniduborukebilazoniz.pdfIn PDF document text
    • http://vidarepi.epizy.com/natopenalo.pdfIn PDF document text
    • http://wowadepadon.rf.gd/derilikami.pdfIn PDF document text
    • http://pimibini.epizy.com/49280875869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b188fa-0fa4-4973-9f5a-7bcdb0c92ba4/star_wars_in_chronological_order_including_shows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eb3f438-9055-4778-8186-e5bc8cee4bfd/nikon_coolscan_v_ed_film_scanner_review.pdfIn PDF document text
    • http://rowopiva.rf.gd/61074260319.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_off000115fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FB 5160 bytes
SHA-256: 675b2a9e3d14e2e7e26954e4ed39eabf8e89e7c99f3f1fb9bb9e3f3b38ae50a8
font_01_sfnt_off00012778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12778 13240 bytes
SHA-256: c0cf3d5f082d54fa9b9db0b2ff8b00c72ff7be9ff018c95579e20bd3d1423331

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