Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea6cd77d5d7f3e0…

MALICIOUS

PDF

78.1 KB Created: 2021-03-02 13:06:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9fddd401be7c01b2fb084ab0ba7bea3c SHA-1: 9703cc927cfef4fbd301c67d5666c34ad06081e7 SHA-256: 8ea6cd77d5d7f3e0f0ba94c919dc1f44d554d741b0820985cefe661713201fb0
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=how+to+use+a+perfect+brownie+pan PDF link annotation
    • https://cdn.sqhk.co/rujamuzizogo/jgdidCq/80430597980.pdfIn PDF document text
    • http://idslim-italia.site/50509446168an56b.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/fmhjSMq/pakovixupaje.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/lh6kCig/fundamentals_of_financial_management_concise_9th_edition_powerpoints.pdfIn PDF document text
    • http://uscreditreport.info/how_to_program_a_magnavox_universal_remote_model_number_mc345fldv0.pdfIn PDF document text
    • http://infonewstravel.com/66942475207cu649.pdfIn PDF document text
    • https://cdn.sqhk.co/buzivafulet/higjvic/khloe_and_tristan_married.pdfIn PDF document text
    • http://cadenalia.com/conceptual_physics_reading_and_study_workbook_chapter_24_answers1nqeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486523/normal_5fffe9d06678c.pdfIn PDF document text
    • http://storeeu.info/79911993650kduoe.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/iggjIjd/meximulutirame.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/qjhMDig/mogepimakodole.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faduzidivatakid.epizy.com/zomimidumimifowo.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/product_catalogue_template_psd_free.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/kufotilizilet.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/buguxosere.pdfIn PDF document text
    • http://bavipilebevim.epizy.com/android_21_sh_figuarts_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/97258603395.pdfIn PDF document text
    • http://movedubeliw.epizy.com/pimubidizadusukevigud.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_off0000f3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 5172 bytes
SHA-256: 77b461f91ebc74f4e4dccd4143b963779793145a2f22f67a18aeae9936d7cb4c
font_01_sfnt_off000105a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A9 11188 bytes
SHA-256: e6cd00c4199f8b5cae242638222d133291e1f3b8a0ecc636e9f98506bd02023a