Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b86662547791ec…

MALICIOUS

PDF

79.6 KB Created: 2021-05-01 19:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: de25434f7d86a542490735ddab64c868 SHA-1: ce97c839eab596f06a2587f6b806a8e67e178f89 SHA-256: 07b86662547791ec588e99882573d124ca5e43acd257c07242a626b6da0df88e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically crafted to appear as a search result for 'guitar theory lessons near me cheap'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/strik?utm_term=guitar+theory+lessons+near+me+cheap PDF link annotation
    • http://jerusitujuj.22web.org/frigidaire_ice_maker_troubleshooting_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/idjcBjc/fezikenarunitavoges.pdfIn PDF document text
    • http://wwbook.org/what_will_a_honda_eu2000i_runfnfma.pdfIn PDF document text
    • https://fitoposibex.weebly.com/uploads/1/3/4/3/134364930/9017016.pdfIn PDF document text
    • http://fresh-ita.space/puch_stickman_rope_hero_2_mod_apktlz93.pdfIn PDF document text
    • http://salonhq.xyz/getty_images_freehcixu.pdfIn PDF document text
    • http://dubiniba.iblogger.org/70628284754.pdfIn PDF document text
    • http://mihetos.xyz/22569650292f50f1.pdfIn PDF document text
    • http://spencermcman.us/tidufegifufovikijuwfsf6.pdfIn PDF document text
    • https://fimibiwuru.weebly.com/uploads/1/3/2/6/132696060/42f29b7b.pdfIn PDF document text
    • http://richmaya.site/ledivovedomamory0sgr.pdfIn PDF document text
    • https://cdn.sqhk.co/tedavevata/oigjj9R/72847241320.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/5Csdhim/55788073002.pdfIn PDF document text
    • http://zathkatow.xyz/17117147077yno89.pdfIn PDF document text
    • https://tinuvireredat.weebly.com/uploads/1/3/4/8/134864568/kuterumodudezanewix.pdfIn PDF document text
    • http://yesstore.pro/armitron_watch_pro_sport_manualnbbay.pdfIn PDF document text
    • http://zatawonilar.iblogger.org/52385032741.pdfIn PDF document text
    • https://kavekoda.weebly.com/uploads/1/3/5/3/135326791/0d13b9287a7e.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/zebarufuridorur/what_is_salesforce_in_simple_terms.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/is_there_a_recall_on_toyota_camry_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/15796170903.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/how_to_replace_the_battery_in_a_black_and_decker_electromate_400.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/cuantos_periodos_tiene_la_historia_natural_dela_enfermedad.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 5304 bytes
SHA-256: 0def667bfae677ec363f767a77671b18e0609fed65ec8b7fd3bfcebd51b23700
font_01_sfnt_off00010c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C69 10728 bytes
SHA-256: f74a2484a5915cff792398929d583406f6978e626eb81adced04e15be43c27e5

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