Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0390bcb7fc15a1c…

MALICIOUS

PDF

75.1 KB Created: 2021-03-02 02:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dc07c8d30583ff62c1149d50ab7fffe2 SHA-1: d5fed404f89b4a334f642938aa7e21f111a21f9f SHA-256: c0390bcb7fc15a1c9a7e6f5832c3f695c7ee0370b7b9882e3f7db03fc8500db8
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution. The document body, though heavily obfuscated, contains keywords related to downloads and applications, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=rising+tides+apk+download PDF link annotation
    • https://cdn.sqhk.co/jigavozef/ij8iehg/dining_table_set_for_4_white.pdfIn PDF document text
    • http://medtechnika1.ru/plane_driving_games_free_for_pc8bte8.pdfIn PDF document text
    • http://idealica-official-it.website/contract_killer_zombies_2_origins_hack_apktjull.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/Chfhcl9/18949363599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_602c2cc99fd60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5fd733e8766de.pdfIn PDF document text
    • http://lebadatow.22web.org/jar_of_hearts_glee_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/gfiahhz/business_strategy_examples_youtube.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/15818274300.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwobevina/KkOhgd6/9150813154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_600c3651834d3.pdfIn PDF document text
    • http://securityverifiedservices.com/structured_interview_of_reported_symptomsgpwtb.pdfIn PDF document text
    • https://cdn.sqhk.co/fasaparoba/hicJhbG/91793226819.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449000/normal_60082d8d48733.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/henogdZ/94235704051.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/2jdxjdu/busisonagotipofaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://refusunono.onlinewebshop.net/what_is_the_best_beginner_instrument.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/harry_potter_and_the_goblet_of_fire_book_synopsis.pdfIn PDF document text
    • http://jeragapa.epizy.com/aagadu_movie_comedy_scenes_free.pdfIn PDF document text
    • http://donovebar.rf.gd/47202118885.pdfIn PDF document text
    • http://gawezupud.epizy.com/garmin_vivofit_3_reset_after_battery_replacement.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_off0000e984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 5196 bytes
SHA-256: 1caaa50b1ac3d452863768261eb03d34983ad547a4b8219b1980b6295b6018dc
font_01_sfnt_off0000fb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 10388 bytes
SHA-256: c4da715d53e0638cb58b51f7693a9fb769939b9e9794b24975fc9fa4a4f84d1c

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