Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fc52257b6704de…

MALICIOUS

PDF

86.1 KB Created: 2021-03-17 13:19:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 46205f6d101df95ce2ea50f1b52c89f8 SHA-1: 7f70b861c9358deaf75e96ada6ab428aed24da8f SHA-256: 90fc52257b6704de2505af910c198963794c3ab7535dace9cf1b66f38db524c3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing attacks. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=judgement+card+game+strategy PDF link annotation
    • https://cdn.sqhk.co/fezusife/fjdUXFe/magical_girl_dress_up_rinmaru.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/fujudixuxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5fd04fd4bb5b1.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/Yghjaf1/nail_art_designs_easy_steps_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/wafabojunawa/jdhgghb/rope_hero_3_game_download_softonic.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/kivobugilukisakiw.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/BjjQ0hf/98263765494.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5fca4d7026d99.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/HkmIVie/airline_tycoon_2_geld_cheats_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/F1t4hah/nightclub_story_mod_apk_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422134/normal_5fdc398e06274.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/sq8_mini_dv_camera_price.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/36232486591.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/bharcra/avion_flight_simulator_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb0c582-a371-41f5-8029-e537e65710e1/59664588529.pdfIn PDF document text
    • http://gevapugono.atwebpages.com/capricho_arabe_sheet_music.pdfIn PDF document text
    • http://desujiruvomeb.myartsonline.com/funerusoriluxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a150b70-9b26-40de-a336-2faefa0dbdc7/zugek.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/spanish_present_tense_regular_verbs_worksheet.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 6

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_off00011495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11495 5320 bytes
SHA-256: 85c5734dd91274fe7713e05440fa1ea8c23e4b46f2b61fb5596a152a7d876808
font_01_sfnt_off00012698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12698 10728 bytes
SHA-256: 09be85663329d6de3ca104a8406a1ed90b3e320910eba70a789c227f99b34f55

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