Malicious PDF — malware analysis report

Static analysis result for SHA-256 127e552323e87b7d…

MALICIOUS

PDF

77.5 KB Created: 2021-03-10 05:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a3d0fccac098f0eb0152180196e4946c SHA-1: 24ee22e53fa40e50db29f084ee74340da1a05e02 SHA-256: 127e552323e87b7da8d636a0ed038d08ffae2655de3850924c5f1286b48b46c0
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though truncated, includes a search query suggesting a lure to a malicious site. The presence of numerous external URIs and a link farm heuristic further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/strik?utm_term=canon+mx922+cannot+connect+to+wifi PDF link annotation
    • http://basvuruizleme.online/alcohol_en_la_familia06pxv.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/4108339059.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385202/normal_5fff2492da12d.pdfIn PDF document text
    • http://winoraama.space/dejivibosureg04nx0.pdfIn PDF document text
    • http://bestunew.xyz/kelugiajpgo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391326/normal_5ff75a201f10b.pdfIn PDF document text
    • http://realwockyc.info/52780443724e4b7y.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/holmes_and_rahe_stress_scale_calculator.pdfIn PDF document text
    • http://limuzinof.ru/graficar_funciones_trigonometricas_tangenteb6e3s.pdfIn PDF document text
    • https://cdn.sqhk.co/bikuloxisage/RhhghBc/beat_cop_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/Fghia2D/braiding_hair_salon_prices.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/rod_stewart_discography_torrentszwu1z.pdfIn PDF document text
    • http://detonic-romania.website/maternal_instincts_movie_2017alrv4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453764/normal_60314101e5be1.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/hciiYdM/santorini_merrick_delivery.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_602e5461334f7.pdfIn PDF document text
    • http://cleanup-sale.site/american_chopper_meme_formatcvce4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/taco_bell_bean_and_cheese_burrito_nutrition.pdfIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/61464286357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d5250b-314c-42c3-abdd-d6e82b6680e0/best_free_editor_lifehacker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3940584-ea05-4414-851d-b65929ac500e/monks_use_weapons_wow.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/casio_g_shock_rangeman_black_panther.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_off0000f324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF324 5072 bytes
SHA-256: 4e927c695615e3e88215195985d7497ad593dcdab42a7e518ce2c2a79d758094
font_01_sfnt_off00010475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10475 10628 bytes
SHA-256: 7cfbaf8ab657463169b1a28f0730c94d30f723365118b97fb6b9d7b9c2fd9430

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