Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d402b53330d803…

MALICIOUS

PDF

77.9 KB Created: 2021-03-16 21:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 57591f3037b84dcc2d779791accad70b SHA-1: 9c951b9bb6eecdc0db236fe8e9fa2c4b1578ed19 SHA-256: b5d402b53330d803bd7c9e799b7344dd801d420c42ee08080bd8c9c1dbc5668b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/strik?utm_term=what+color+shirt+goes+well+with+navy+blue+shorts PDF link annotation
    • http://nuzenurego.22web.org/wozizugevubaxarasizoxosa.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/qgdlgdb/rezudutewodupokibusoda.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/lcicjip/best_popular_trending_videos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_6035d15dac1c1.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/7NZLChf/71493563924.pdfIn PDF document text
    • http://bemijaragilez.22web.org/adhikar_old_movie_songs.pdfIn PDF document text
    • http://taxavifosobedul.iblogger.org/aggiornamento_android_samsung_j5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_600e2dbe8a83a.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/njeSgjJ/72488354532.pdfIn PDF document text
    • http://sazavenegot.22web.org/best_headset_audio_settings_for_warzone.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/a4gjigK/pagisofogesevijasoka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450890/normal_600764b419b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485313/normal_5fd28ee364b86.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokizijam/vjbIjjn/guess_the_movie_actors_malayalam_football_bird.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/WtiggjM/93962551749.pdfIn PDF document text
    • http://modusebipiz.iblogger.org/ipad_mini_4_price_philippines.pdfIn PDF document text
    • http://rabejagoruwobol.66ghz.com/meme_templates_tamil_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/zijjdAV/dual_monitor_stand_for_desk_vertical.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489717/normal_5fe06343e6812.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/vihsWgf/kovasoxepeweruxediviwera.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/j8Pijgi/jenusabit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zogutofarori.epizy.com/32277141970.pdfIn PDF document text
    • http://xolupikogadeka.epizy.com/78503754271.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44B 5352 bytes
SHA-256: c4efd0a0f903809476be1ae37e6a45b5d024e105bea0709f12c1c5cd53b454b1
font_01_sfnt_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 10876 bytes
SHA-256: 94efd24a1f12c3edaa6fba5e7e496d65b6dd66bd187d47d212644a406f883d72
font_02_sfnt_off00011b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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