Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9c186a5e721960…

MALICIOUS

PDF

80.5 KB Created: 2021-04-10 13:26:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1e778c8e4366914a53f3a133b6683a74 SHA-1: 7a5c33c66e429a6e57cace28a01842499926acb0 SHA-256: 5f9c186a5e721960fc715aa129d36cd98ccbd9e04f6e44cbe6dfb63f2b0eab29
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file is classified as malicious by multiple heuristics and an ML classifier. It contains a large number of embedded URLs, many of which point to disposable hosting or known redirector infrastructure. The document body, though heavily obfuscated, appears to contain search-like queries, suggesting a phishing or scam lure to drive users to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=what+size+tires+go+on+a+2008+ford+focus In PDF document text
    • http://xurekovof.22web.org/12252482380.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/zjaijWH/silver_dollar_city_branson_missouri_discount_tickets.pdfIn PDF document text
    • http://meetsalon.xyz/pewamowojubatuxt11f.pdfIn PDF document text
    • http://sunshop.pro/everfi_venture_module_1_answers5fsbb.pdfIn PDF document text
    • https://cdn.sqhk.co/worijekegir/pePi9Bi/vebiki.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/49028878629.pdfIn PDF document text
    • https://cdn.sqhk.co/zokonerozo/jjcq4gc/casino_slots_app_for_sale.pdfIn PDF document text
    • http://mibilivo.scienceontheweb.net/famaparan.pdfIn PDF document text
    • http://stroymarketmetal.ru/how_much_are_pfaff_sewing_machineseo5zu.pdfIn PDF document text
    • http://wosedumuf.mywebcommunity.org/delotizan.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/wtnLFhj/fabojotetuner.pdfIn PDF document text
    • https://cdn.sqhk.co/gotubosif/akHhijh/55237663336.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/bghibjf/zombies_can_t_jump_2_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/1VgejiU/viduxusonobebos.pdfIn PDF document text
    • http://meinekarten.best/nimejoxofusebimozozijuki0jkkz.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/hhrgjKW/school_management_system_app_free.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/business_english_vocabulary_test.pdfIn PDF document text
    • http://cucoupon.info/ielts_reading_recent_actual_tests_2019_downloadloc8b.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/ciiF81S/tower_defense_android_classic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keputeka.epizy.com/63291719626.pdfIn PDF document text
    • http://wumekupewug.rf.gd/76849476217.pdfIn PDF document text
    • http://nasarijexu.epizy.com/lajuvumi.pdfIn PDF document text
    • http://welidigukiru.epizy.com/80990280047.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/los_hermanos_karamazov_resumen_breve.pdfIn PDF document text
    • http://tutivute.epizy.com/jofavowoviwagopap.pdfIn PDF document text
    • http://fafiwokewe.epizy.com/lesuxatez.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_off0000facf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 5784 bytes
SHA-256: 8ef2804144555ed547b7000be0a92008555eeff6824e9db177a99ddb04c92e61
font_01_sfnt_off00010e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8E 11012 bytes
SHA-256: 0ffbb641f03e9d482780a83479205dab1c48aa401286f074b82c39ce13b1fd95

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