Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eea4fe9d07e2dc6…

MALICIOUS

PDF

81.8 KB Created: 2021-05-02 13:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bcefb4ec85b803fb500aa9954c769fe2 SHA-1: 5a75075c6e19908d93854ae2ae35f676bee2b4ab SHA-256: 3eea4fe9d07e2dc6506fc95e94b761cf3ca609277499913761268dad23dc6936
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://crophysi.ru/strik?utm_term=amc+8+2017+statistics PDF link annotation
    • http://itclick.pro/zoom_h2_windows_10rcq5w.pdfIn PDF document text
    • http://my-favshope.online/why_are_my_wireless_earphones_not_charging4i9ij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485015/normal_600a22a5552ba.pdfIn PDF document text
    • http://freshmind.net/rinnai_gas_log_heater_operating_instructionskgsz0.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/memories_will_never_fade_tattoo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_5fdfd572419d4.pdfIn PDF document text
    • http://soinjaga.ru/25090168216s03qg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_5fdc60e0132e9.pdfIn PDF document text
    • http://koxutafup.iblogger.org/41663766430.pdfIn PDF document text
    • http://flipping-car.online/91418464257oi94k.pdfIn PDF document text
    • http://numberoone.xyz/icici_payment_slipl1gu8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_6045897528d53.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/wototabumelimaresd57ft.pdfIn PDF document text
    • http://top-agent.ru/hindu_calendar_2019_hindi_downloadn6j82.pdfIn PDF document text
    • http://aduo5.online/angular_template_form_validation_examplewvbza.pdfIn PDF document text
    • http://opencabinets.xyz/dozarukugpsbja.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/dell_foxconn_ls-_36_motherboard_manubupn2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450260/normal_5fea454e5a275.pdfIn PDF document text
    • http://7lessons.website/how_do_i_reset_my_bose_cinemate_remote84gds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letibeboga.rf.gd/intimate_apparel_us_dropshippers.pdfIn PDF document text
    • http://raxegujanamefas.atwebpages.com/al_quran_download.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/sequence_card_game_board.pdfIn PDF document text
    • http://duzixojaxop.rf.gd/34505349688.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/65226320505.pdfIn PDF document text
    • http://sukepavudopuje.epizy.com/m-audio_oxygen_49_driver_mac_os_x.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_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 5404 bytes
SHA-256: dc59d5ef71669ccc8f372c51392dce80588e60047cd92ca903496ebc3f927802
font_01_sfnt_off00011188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11188 11852 bytes
SHA-256: 28dfde6344eb2eaa919c2d4108dbc4f1c5932b115c418748e1aa286fb7641c8c

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