Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd4fc73f41a0994…

MALICIOUS

PDF

77.3 KB Created: 2021-03-17 22:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8d3d6ff174d0bddef67492e8d71cf357 SHA-1: 5bd5be3f369f70c31488fca617e732019f3cf788 SHA-256: 6cd4fc73f41a0994930e70d81518f94e78f2f0250aed9be8bd248eaff79c6733
196 Risk Score

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. It uses a password-protected-archive lure. 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 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/strik?utm_term=scientific+research+project+proposal+template PDF link annotation
    • http://qqkaxes.xyz/how_to_get_real_time_stock_pricesuffkp.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/what_is_meant_by_digital_communication.pdfIn PDF document text
    • https://cdn.sqhk.co/pupoxobumake/QjdZiaR/digital_marketing_director_salary_los_angeles.pdfIn PDF document text
    • http://bit7.top/how_to_keep_my_ice_maker_from_freezing_upnplu8.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/diccionario_biblico_reina_valera_gratis.pdfIn PDF document text
    • http://phrensy.co/adverb_intensifiers_worksheet4f8o0.pdfIn PDF document text
    • http://repair-planshetov.ru/worship_music_sheet_music_freesfbyl.pdfIn PDF document text
    • https://cdn.sqhk.co/nobegasosev/AGicjfW/musobadadige.pdfIn PDF document text
    • http://peskomment.ru/wovakaxinojipopelmhdb.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzomowa/NOicuhc/pokemon_ultra_sun_version_game.pdfIn PDF document text
    • http://interplast.ru/43977385762mlc32.pdfIn PDF document text
    • http://hookup682.site/self_guided_driving_tours_of_scotlandws64t.pdfIn PDF document text
    • http://jubigale.scienceontheweb.net/cours_d_orthographe_ce1.pdfIn PDF document text
    • http://betmoy56.com/income_tax_filing_online_guide13sl6.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/minegikukovel/walubazurepobosaxop.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/18535014792.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/what_is_super_password_for_swann_dvr.pdfIn PDF document text
    • https://6a543b89-810f-4a07-932c-4cc129fc401a.filesusr.com/ugd/1e5726_a340505c717b4f3b9687438a5dabc59d.pdf?index=trueIn PDF document text
    • http://rixibedi.onlinewebshop.net/achtung_cthulhu_savage_worlds.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/osn_biologi_sma.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/90634464239.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/fugelopeva.pdfIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_adab19826152480bb7f8eac9ff35182f.pdf?index=trueIn 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_off0000eece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 5436 bytes
SHA-256: 55e27a762bf9d23226aa1f9c6881fc57705188ed5a3c30dbbe8d0a4df1e36848
font_01_sfnt_off00010129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10129 10536 bytes
SHA-256: be47005cede778c15885d7fafdc57133c880499ec82e6499676c7383af9af257

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