Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1c69be2d6afccb…

MALICIOUS

PDF

79.3 KB Created: 2021-03-03 18:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d59bc6d50ba0257bb724bc6f8a7243f9 SHA-1: 27a5f4a6a11bcb4fa228d1ba68c1976f61232a02 SHA-256: be1c69be2d6afccb5c8be3d37a31e17dcc156f43ea6024901d9dbac0528299f6
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics, including ML classification and ClamAV detection. It contains numerous external URLs, many hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm designed to attract traffic, likely for malicious purposes. No scripts were extracted, but the PDF structure itself facilitates redirection to these external sites.

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://ponafet.ru/strik?utm_term=quality+management+plan+example+pdf PDF link annotation
    • http://rozujed.sportsontheweb.net/short_story_competitions_december_2020.pdfIn PDF document text
    • http://vizionsmc.net/70626233076yfawu.pdfIn PDF document text
    • http://detonic-buy.website/thimiru_pudichavan_full_movie_tamilrockers._pheyvoa.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/first_grade_math_standards_cheat_sheet.pdfIn PDF document text
    • http://copyrightprivacy.site/batman_the_enemy_within_switch_gameplay9xaij.pdfIn PDF document text
    • http://my-favshopg.online/kapidigekekotukuyz8n5.pdfIn PDF document text
    • http://tozaworewinox.mywebcommunity.org/articulo_4_dela_constitucion_politica_de_la_salud.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/ibjhpnV/wuwukalodem.pdfIn PDF document text
    • http://itactical.xyz/31070958659og8m8.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/bXkjhha/tech_deck_mega_ramp_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/ZjhkhcT/real_gangster_crime_mod_apk_gamemoddownload._com.pdfIn PDF document text
    • http://afracheat6.xyz/what_is_the_wps_button_on_my_att_routerhto6e.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/ihijPhg/3564500899.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/zopelopafira.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/GmhfJii/milk_processing_plant_design.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/cfyYVja/jabeworibopidevojatizo.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/dejazuvorira/zasip.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/action_games_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/84915003420.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_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 5316 bytes
SHA-256: 57f97b2603f27aff0608d7f253667b1c3839b750a4e2b517972df6887ed9f0b1
font_01_sfnt_off00010ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB8 10948 bytes
SHA-256: e9c4fb11977809f0104a611f8118d45c7832e90436d54e27ad05ada4a0e8fdf7

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