Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd460e494f1c1e5…

MALICIOUS

PDF

100.0 KB Created: 2021-03-18 14:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 68aa982161d9f24006879c8e6357ccd5 SHA-1: 58b13f45e2b48a2e3e72feb26c35598fcedcb3b6 SHA-256: 0dd460e494f1c1e526591e1f9a28092e367f86a04368002d29e63979cd7a37b9
186 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. 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 0.9978

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.
  • 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://kuzutuzo.ru/award?keyword=abel+albonetti+30+day+arms+pdf PDF link annotation
    • https://fiketizi.weebly.com/uploads/1/3/5/3/135387405/5838997.pdfIn PDF document text
    • https://fotofewoxa.weebly.com/uploads/1/3/4/8/134849098/darewofefijexos_matifepi_filad.pdfIn PDF document text
    • https://pevamuwewewi.weebly.com/uploads/1/3/4/6/134636281/c51023138.pdfIn PDF document text
    • https://telefaxukewinet.weebly.com/uploads/1/3/4/3/134320065/6936007.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/f552f7c.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/9252751.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/icERsji/first_choice_power_company_phone_number.pdfIn PDF document text
    • https://pubategikosiw.weebly.com/uploads/1/3/4/1/134131453/40daba10c2.pdfIn PDF document text
    • https://kugugurufive.weebly.com/uploads/1/3/4/1/134108893/344284.pdfIn PDF document text
    • https://cdn.sqhk.co/nivurerazusa/j6AicAy/taletirijul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/goneduzum/best_toshiba_remote_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9150ac2b-b027-4477-9ebf-6a937f02bf08/what_is_creative_development_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098a926b-fe33-496d-8db6-b04cbd7f3abe/56248454137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c0de27-5b86-4c43-8aac-7bdaf3f234a9/beyond_bigger_leaner_stronger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd68d60-1282-41dc-9c67-19b61c04b33f/windows_10_the_missing_manual_by_david_pogue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4abb8f-4563-4047-a17e-7bfa79fab112/book_of_daniel_quiz_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/79373776102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af8cad9a-e10d-466d-8617-6c096466aad3/nordictrack_audiostrider_990_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d64176ea-9e57-4b8a-85a5-fa3077711ebb/52745570323.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/87207871665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb65a8d1-c750-4ebf-8b20-26e3a48408fa/honda_izy_carb_gasket_kit_gcv135_gcv160.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/gujemujidosodotudova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f835464f-6a8a-4ed1-92f9-4092b95def39/86020903359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b96ed8-322c-416c-8b0b-6d361da87ce7/sonalosukazofasidami.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12166 5724 bytes
SHA-256: f88dcba1bb149f24f00d615df7ca34bb737948cbcc7caf94b702072c3a60441a
font_01_sfnt_off000134cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CD 4600 bytes
SHA-256: 7f6cad8601543b20eaa665b063e76984ed374e9d99bb47a961593b0af3eacbb7
font_02_sfnt_off00014360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14360 7656 bytes
SHA-256: 151896cef2ea75ba369f76dbf30600af6bd7bf0f22c5419ce580c41470d62f39
font_03_sfnt_off00015880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15880 12668 bytes
SHA-256: e6e5760c0c05787dfbf8f7a4029a03f697a4e3ba529674bb7ba228fb29f56a1a