Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3be93d6c7334c70…

MALICIOUS

PDF

70.0 KB Created: 2021-04-06 04:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5fc3be2415d351dd4560573a0d59a971 SHA-1: b11019b76eb7bbb4e73b501f13ecd76b208978b9 SHA-256: f3be93d6c7334c70747d56b6554d19edcce613bf9524459cdb28da9cef26c386
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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 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://xajibur.ru/strik?utm_term=why+my+brother+printer+will+not+print PDF link annotation
    • http://degimogug.mypressonline.com/2601892276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450249/normal_6060dc7d944d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447649/normal_5fef19a6bb96b.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/diasiIK/star_realms_advanced_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/aheqLBT/16160521454.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374532/normal_5fc6ff1f3ff5e.pdfIn PDF document text
    • https://cdn.sqhk.co/worijekegir/G6jahe6/barish_ki_dua_song.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/voltage_drop_formula_for_cables.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_602ee28ecd716.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/kiao7Ix/thrift_savings_plan_tsp.pdfIn PDF document text
    • http://zarumesa.mypressonline.com/mini_generador_eolico.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447108/normal_5ffdd0b557782.pdfIn PDF document text
    • http://giwosesupalu.medianewsonline.com/23792011370.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/sosupejuxofedo/ludedori.pdfIn PDF document text
    • http://xegalimupajodaf.rf.gd/los_principios_de_la_economia_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/84160021562.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/hp_officejet_pro_8600_scan_to_email_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2779edf-cc1e-460a-b928-08723e18d21f/how_to_pair_xfinity_remote_to_lg_soundbar.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/lab_report_titration.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/how_to_learn_organic_chemistry_reactions.pdfIn PDF document text
    • http://merojupamen.epizy.com/santa_muerte_prayer_beads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/760ae77b-78dd-42b7-bea6-8fbc14321a83/their_eyes_were_watching_god_chapter_7-9_summary.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_off0000d6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BA 5020 bytes
SHA-256: d04b9a3e07eaac3543f0436595ab34c6b1df65998b72d0664664fe7be14962c6
font_01_sfnt_off0000e7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B4 10032 bytes
SHA-256: 58894f8c1350dc9cfa77992a3dcea968f5706624c78a03496f56ca38c8320c90

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