Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8bcebbda16873d…

MALICIOUS

PDF

78.1 KB Created: 2021-03-23 03:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fc92e45c362ec2f4e1f60ff148b3c862 SHA-1: a41f0940ef125038cf5f1fef97d5cd717a1f103a SHA-256: 9e8bcebbda16873d4c04fbd40a2ee7cae0f24820460daeaea2cd948e6c8cd8e2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing or trojan variant. The embedded URLs are designed to lead users to download potentially unwanted or malicious software, or to phishing sites.

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://xezojetit.ru/wix?keyword=baixar+peggo+pro+apk PDF link annotation
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/5966004.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/6672893.pdfIn PDF document text
    • http://sportplays.ru/dolavaxajesagiwefebavoauc9y.pdfIn PDF document text
    • http://omshop.space/xigiligubipifidafezudiko1ntr5.pdfIn PDF document text
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/mokede.pdfIn PDF document text
    • http://rm-swis-mine.com/catholic_university_of_malawibtnn9.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/gjg8jhP/26663101883.pdfIn PDF document text
    • https://savozajit.weebly.com/uploads/1/3/5/3/135320594/01678b.pdfIn PDF document text
    • https://cdn.sqhk.co/kilobubag/hfCmhbk/xomozi.pdfIn PDF document text
    • http://oblakova.ru/ms_project_2019_pro_iso_downloadzq1ck.pdfIn PDF document text
    • http://haustova.com/acer_aspire_e15_i5_5200u_specszv73u.pdfIn PDF document text
    • https://cdn.sqhk.co/rujopupomob/hfjjAy3/coffin_nails_fall_colors.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/muvarelo/emulator_ios_untuk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/australian_visa_application_form_956a.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/avast_free_for_windows_xp_sp3.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/44357919762.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/woduvijefuzeputud.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/nexus_mods_witcher_2_tweaker.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/plus_size_formal_wear_for_weddings_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/pengertian_akuntansi_sistem_informasi.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/zatisadoxapuwom.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/sample_cash_flow_projection_spreadsheet.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_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 4960 bytes
SHA-256: ee898aa5d34e27409408f0cf2f927b33981cf1580fe6105c584b4d91d998a03c
font_01_sfnt_off0001068f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 10804 bytes
SHA-256: 60071432722ad3763563a8a1d6d7f7e0325fd1b4cd3101e330d1bf7835d42840

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