Malicious PDF — malware analysis report

Static analysis result for SHA-256 5916e2bf32f58cad…

MALICIOUS

PDF

91.9 KB Created: 2021-02-26 06:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6132b7a13847a924da40bba2b3a7cda8 SHA-1: e1037651d8b8fc7cd72940bd94e3b5a2bb7a76dd SHA-256: 5916e2bf32f58cadae88888c6fecb67e14ca1674f8f2c6c9f5baccb7177025a5
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to potentially malicious domains, disguised as a help query for a Netgear WiFi extender. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to external, untrusted resources.

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://jottigo.ru/award?keyword=how+do+i+reset+my+netgear+wifi+extender+wn3000rpv3 PDF link annotation
    • http://kersita.space/decimal_place_value_chart_5th_gradeylv9q.pdfIn PDF document text
    • https://gazonuzurixe.weebly.com/uploads/1/3/4/4/134485976/bekixap.pdfIn PDF document text
    • http://vas-rem.ru/como_hacer_una_base_de_datos_en_access_ejecutablezzocd.pdfIn PDF document text
    • https://zisugopijelides.weebly.com/uploads/1/3/1/4/131438068/furisivoxali-nikojupogov-mozovijuvog.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/bb5ef.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/hggijia/highway_rider_gameplay.pdfIn PDF document text
    • https://zozetaxurumel.weebly.com/uploads/1/3/4/5/134590082/4352b1b.pdfIn PDF document text
    • http://handler-autoscout24.com/jutavg8lmq.pdfIn PDF document text
    • http://good-production11.site/jack_and_the_beanstalk_story_with_pictures4q1s2.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/jiwFiaE/globe_load_card_to_tm_sim.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/jijumupade/anna_thammudu_old_movie_songs.pdfIn PDF document text
    • http://mokufapupajenap.epizy.com/carrom_pool_online_game.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_off000125b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B4 5920 bytes
SHA-256: 6ca03680122695a272bd33bc4bc4aa12451b9edbe182bc857bf0faf6467b2600
font_01_sfnt_off000139e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E2 11308 bytes
SHA-256: cb041f4d771345ef6cac10a5b096c58534528944be0031bbeabf85828640f7cc

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