Malicious PDF — malware analysis report

Static analysis result for SHA-256 7333db9fd9442abe…

MALICIOUS

PDF

130.0 KB Created: 2021-03-20 04:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ee0f6c932dd8f76297abf4ba9cc54add SHA-1: 3ea1c0e43f8477fce12ae1eff56affc1bd9df42e SHA-256: 7333db9fd9442abea80a7634eac23cd6bc00f1d1d79bc35cfbb5c316237dfca6
126 Risk Score

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 0.9985

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://seumenha.ru/wix?keyword=google+nest+smoke+alarm+manual PDF link annotation
    • http://doluridibulif.iblogger.org/33814534041.pdfIn PDF document text
    • http://losqutoq.online/how_to_change_time_casio_g_shock_5081u2mg6.pdfIn PDF document text
    • http://tufejife.22web.org/datepicker_date_format_with_time.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/blackmagic_video_switcher_atem_pro.pdfIn PDF document text
    • http://fullhp.info/23551439631qbl0f.pdfIn PDF document text
    • http://detonic-ufficiale.website/retogevexedotaruqc8pq.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/fidZ5ic/swepco_contact_phone_number_pay_bill.pdfIn PDF document text
    • https://cdn.sqhk.co/ribuwikoli/iiegeha/akalicious_songs_2019.pdfIn PDF document text
    • http://usesoda.pro/agent_vinod_movie_all_songs4ss68.pdfIn PDF document text
    • http://nesarose.sportsontheweb.net/83905746347.pdfIn PDF document text
    • http://polikarmonolit.ru/8557249838vbwb5.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/32992737446.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/igiaegi/nifafutesetukepatilasuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuzofu/ibD2NhT/jesum.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/rxjdhdO/vip_health_care_dog.pdfIn PDF document text
    • http://badge-verification-center.com/who_are_the_characters_in_the_story_of_the_little_prince_describe_each_brainlym54bn.pdfIn PDF document text
    • http://xabudumame.mypressonline.com/surah_yasin_quran.pdfIn PDF document text
    • http://lngcliente.com/65124515205j674v.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jekurur.atwebpages.com/concepto_de_amilasa.pdfIn PDF document text
    • http://pakapenabu.atwebpages.com/pdf_blank_map_of_africa.pdfIn PDF document text
    • http://mikijanux.atwebpages.com/how_do_i_connect_my_samsung_wireless_printer_to_my_mac.pdfIn PDF document text
    • http://tapogexolewiji.epizy.com/jewinagikoxewe.pdfIn PDF document text
    • http://turikumulalevi.rf.gd/how_to_open_a_safe_sentry_safe.pdfIn PDF document text
    • http://fazovalekotevo.onlinewebshop.net/zodemutizes.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001ac2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1AC2E 13136 bytes
SHA-256: 2f1ca268ef082c32afba3fac5978a2d23cf3254c65d6f0a7cae62b1ee3c6fadd
font_00_sfnt_off000104b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B8 49268 bytes
SHA-256: e50f2bcfcf27fdc4ae4f370ad2b728830f32f3ebe46478f3031795cfbd8d6ce2
font_01_sfnt_off00019aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AEF 5100 bytes
SHA-256: 3cfa3ce3052d4a1568d6444a28fb9d4bdf744a7485fdfa79d123851ae44936df
font_03_sfnt_off0001d061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D061 13448 bytes
SHA-256: 6f421a297cc4c952d8e065027adb5b1cc313593169ab5d772a8bbb44ad9f3b51

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