Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1366f65516af45b…

MALICIOUS

PDF

83.9 KB Created: 2021-04-29 01:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 48c949261e2894ec43efe48a38518f5d SHA-1: 98448f656efa42357513d8505e09416eefe9e84f SHA-256: d1366f65516af45bff789d8f1833f1be63701615326e1d3d0eeeae083030f002
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 0.9998

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://botokaw.ru/strik?utm_term=world+war+z+full+movie+online+with+english+subtitles PDF link annotation
    • http://gelchlen.fun/real_estate_academy_near_mei2g4n.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/allopathic_medicine_book_free_download.pdfIn PDF document text
    • http://islandlandscapesbb.com/free_android_file_transfer_app_for_windowszzy2t.pdfIn PDF document text
    • http://fogejebimo.scienceontheweb.net/polozowabozixanarifotel.pdfIn PDF document text
    • http://serviceforyou.site/crossfit_workout_of_the_day_app2cp40.pdfIn PDF document text
    • http://geleostone.online/spanish_vocabulary_worksheets1dgjp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424991/normal_6002e276b3d9d.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/pamosesubia4rx2.pdfIn PDF document text
    • http://netewe8.xyz/raxawunukexikepukdg827.pdfIn PDF document text
    • http://my-favshope.online/weighted_rating_methoduixll.pdfIn PDF document text
    • http://servisvds.ru/samsung_ml-2165w_software_download_mac33uoy.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/academic_writing_for_graduate_students_answer_key.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/933f68f6-5509-43c2-9c7e-51e85819dab0/easy_tablet_weaving_patterns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8828f94f-cab1-4897-9221-ca85ece41879/86434616345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adac645d-e0c5-4744-aff7-c1a27795a60b/historia_del_derecho_mexicano_unam.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/xezodemefofijejemovoduji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/751ddb01-b27a-4370-a974-41d8211a8327/77459716496.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/zujuwefojuzazosil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AF 5560 bytes
SHA-256: df88ad97dc0295d5c2fe17d9a5aa4ac37caed8220c59495d3871080a4f5cb65b
font_01_sfnt_off00010c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C95 11464 bytes
SHA-256: 9a44e60b9feb47567fefbccaa188d9045740907866b2572bc6a0c0b6921de1f3
font_02_sfnt_off0001335b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c