Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20bdbaa96e10f7c…

MALICIOUS

PDF

92.6 KB Created: 2021-03-27 22:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 329c748cbeaf32dfaef15b4659229711 SHA-1: 46c435b9372ecb358b53ef0716cbb5cbe910524d SHA-256: c20bdbaa96e10f7cd4b6404af12e5bf95be048b5d543934e04515672de247e56
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://kuzutuzo.ru/award?keyword=bsc+magazine+pdf+june+2020+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384470/normal_602e617b699c7.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/ihpjahz/car_driving_simulator_unblocked_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_601e57a74d33e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_605c93eb43fe3.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/P3SdjaR/epic_game_launcher_support.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/ihgcChi/24848383236.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/S2Xhhic/15503887069.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/ZC7TigH/66085730989.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/dictionary_definition_construction_worker.pdfIn PDF document text
    • https://cdn.sqhk.co/kenujowemi/gafu6J5/junadalolonefep.pdfIn PDF document text
    • http://somubuzesixuwun.getenjoyment.net/rigulozinoniwewawadiluvub.pdfIn PDF document text
    • http://giwosesupalu.medianewsonline.com/cbse_guide_for_class_10.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/86069887672.pdfIn PDF document text
    • https://cdn.sqhk.co/zufosupiz/CbjeM94/t-_mobile_store_manager_salary_california.pdfIn PDF document text
    • https://cdn.sqhk.co/jusulikipe/heFApzQ/chocolate_biscuit_wedding_cake_icing.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/csf3HVY/funny_stickers_for_snapchat_group_chats.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/ifzihid/42863065190.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/giAHn3q/rap_beat_maker_app_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_5fe817c6590ec.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://firiwigisu.atwebpages.com/66447305534.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/go_ask_alice_song_grace_slick.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_off00011d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D67 5612 bytes
SHA-256: 4e4e3b8b0fa1ac26a41f64083cc3f8bcdb04da36e45c43d5dd911e3e5661c9bd
font_01_sfnt_off00013054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13054 11220 bytes
SHA-256: 82f63ae379bc68064579f0f21a47d564767c5a5b9e3d359331d2ab587717a026
font_02_sfnt_off00015689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15689 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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