Malicious PDF — malware analysis report

Static analysis result for SHA-256 41eb2b71b7ccc708…

MALICIOUS

PDF

83.1 KB Created: 2021-04-06 10:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a71aeeee2f5d20dd9cd396584f8d200 SHA-1: 592956c97ba8d060d29dc6ec3480aa50c069cb5e SHA-256: 41eb2b71b7ccc70880f9382928322d48ff69726388669172813ab0b3aba338c2
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 0.9997

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://lozipotod.ru/award?keyword=marathi+bhajan+lyrics+download+pdf PDF link annotation
    • http://genusadnlo.space/95487820795tq3u2.pdfIn PDF document text
    • http://wisecredit.info/949213791669rups.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/naza_m_lite_upgrade_auf_v2u0gsl.pdfIn PDF document text
    • http://iranianvc.com/napexurufanirumeparovqygf.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/web_development_full_tutorial.pdfIn PDF document text
    • http://idealica-itufficiale.website/benim_hocam_ders_notlar_yksb85u2.pdfIn PDF document text
    • http://lovelid.xyz/710391589188zxcr.pdfIn PDF document text
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/mufatidekar_jivud_minebefidepap.pdfIn PDF document text
    • http://dofegogojewipo.iblogger.org/bukugujosabukoxiga.pdfIn PDF document text
    • http://wopizup.mypressonline.com/97043276086.pdfIn PDF document text
    • http://drnextact.xyz/rugedodinows6ikv.pdfIn PDF document text
    • https://lesavamu.weebly.com/uploads/1/3/5/3/135347369/naxatiwuvorax.pdfIn PDF document text
    • https://lumuvimusu.weebly.com/uploads/1/3/4/7/134719948/zojumedetamirax_tuwativ_bodupifaseveze.pdfIn PDF document text
    • http://mufajaku.medianewsonline.com/arteriovenous_fistula_surgery.pdfIn PDF document text
    • http://expo-kit.ru/pl_sql_if_statement_multiple_conditions5k4f4.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
    • http://lufopudizomuv.atwebpages.com/bebaputixutoz.pdfIn PDF document text
    • http://sumawimibodi.rf.gd/bacteria_structure_and_function_worksheet.pdfIn PDF document text
    • http://nilikimapineti.epizy.com/woods_heavy_duty_timer_50012_instructions.pdfIn PDF document text
    • http://wogurep.epizy.com/23291557516.pdfIn PDF document text
    • http://jolagetota.epizy.com/appium_android_java_tutorial.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_off0000fa49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA49 5328 bytes
SHA-256: 6fe555bb01440d1c314b351bf28fcfca92cb7e562e501c794e8a7354ae2868c5
font_01_sfnt_off00010c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C69 10840 bytes
SHA-256: 292bf70f36f0c1007bdb06c811236ac9a720196c6f33fee05b5c8b25d425f82e
font_02_sfnt_off00013148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13148 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378