Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bae3f4934022cac…

MALICIOUS

PDF

112.2 KB Created: 2021-03-20 02:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: efee81e95e81a2c074389d4c84c37123 SHA-1: 5c9f2bb0d63aa72be1877d9fae3406ab65f7bcde SHA-256: 7bae3f4934022cacebe36e12e03a53eba302498070809397af5d491909145938
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 0.9869

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://vilenefex.ru/strik?utm_term=download+lagu+river+flows+in+you+piano+cover PDF link annotation
    • https://cdn.sqhk.co/xafeperale/gdhfPhc/thrive_island_survival_gameplay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381978/normal_6000241090e36.pdfIn PDF document text
    • https://cdn.sqhk.co/defalevoruw/hfbicij/40486915481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501975/normal_60356ca9c210a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_600def04664cd.pdfIn PDF document text
    • http://chategratis.online/naruto_shippuden_legends_akatsuki_rising_cheats_download4tidc.pdfIn PDF document text
    • http://idealica-official-it.website/tuxuvolegolan1sxx.pdfIn PDF document text
    • http://stankoff.org/906960190834x27b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498893/normal_5fc9c37a8516b.pdfIn PDF document text
    • http://nanolenka.xyz/what_happened_during_the_european_renaissanceny8yd.pdfIn PDF document text
    • http://cheapestshop.xyz/roblox_superhero_tycoon_downloadik3er.pdfIn PDF document text
    • https://cdn.sqhk.co/kozosorole/dNaKhil/6412342915.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/brand_identity_prism.pdfIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_eaa8f5678aa14ed1aee3377a70e08098.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/free_personal_auto_loan_agreement_template.pdfIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_688edfa3d9b54408b75cfa05975a544b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13779dca-a194-4f22-94f9-748c4e633d85/twilight_saga_eclipse_full_movie_download_in_hindi_hd_720p.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_704cdb1e57084076a24dd88f5ba22dce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1dd9f99-9cbc-42ca-8ae2-f2ffe7d4c562/song_of_solomon_2_niv.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/portable_antivirus_for_pen_drive_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca80d22-e434-40e6-bcf8-e19fc2ad9d82/x_ray_circuit.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_4808ac968c5241a0981461f317cc3c2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c31c551a-a9ea-4302-b582-8469225ee8e9/how_to_start_gre_test_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/17521376755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08ff193-beb2-4c8d-a479-30e3d879644a/tomesonizuvowik.pdfIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_d72c00b5a0674b26be6c64b424c813f7.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00019218.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19218 19216 bytes
SHA-256: 3ba8f491f91a79658333d5608a417ed0960aba1d36eccbd113f35531e0710407
font_00_sfnt_off00013ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED6 3920 bytes
SHA-256: 6e6d429a42fbbada8926e2942f6c5b4864ad32dbba193f808cc4e772dfd816c2
font_01_sfnt_off00014cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC7 5576 bytes
SHA-256: 677361d0090ed5d54bb2bb25c1029042819b21ff7ff51a01bcc1f54fbed37acf
font_02_sfnt_off00015ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF8 2316 bytes
SHA-256: 374e1bc11049e2750aa53ff29b446c0e843747e6ee03840a29de6d159c99b266
font_03_sfnt_off000169e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169E7 12016 bytes
SHA-256: ba9343780eff9db815dd137fdc03f944c01ffab1f43960299450b7ff5cdf3e2f

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