Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdedbfbf9069179c…

MALICIOUS

PDF

169.7 KB Created: 2021-03-23 02:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c784afc02d7566981161eb006eab18ae SHA-1: 56c4b66075fde01fada2e86692b4c98e111a9a51 SHA-256: bdedbfbf9069179cc58fe66e419626e4f1a69ea0bfc78fec0522b55d8ce48fda
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 0.9995

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://druttle.ru/wix?keyword=percy+jackson+reyna PDF link annotation
    • https://cdn.sqhk.co/navotezive/bZhf1ge/kamituguwonenem.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/d8jeJja/pasofaloxurekakuzetupeluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425919/normal_600fb4172c02f.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/Jv8hjgc/the_equalizer_tv_show_watch_online.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/72912166226.pdfIn PDF document text
    • http://vedivux.mygamesonline.org/11490296672.pdfIn PDF document text
    • https://cdn.sqhk.co/poxudanefisi/aifibje/random_thai_alphabet_for_design_fonts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_6013f4637e57c.pdfIn PDF document text
    • http://saxosoxajivovud.medianewsonline.com/49057719025.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/gbkchb9/moose_pikmi_pops_bubble_drops_squeeze_ball_maker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_3472f2a788e14ccba2ba40e956248138.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/862db143-7eb1-48be-9db6-148930df334b/britax_romer_car_seat_washing.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/anti_ragging_form_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44bae9e-e9a8-4c2e-ac54-36ff5e5416aa/zotigufetewuxib.pdfIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_bbed1d5bf6e8400999def212f6f84e53.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8fe129-a90f-4fa1-9a6d-842747b08843/70692360185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdfea0a9-221c-4cbf-94ab-c3238ff38d16/99397367996.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_59e7e8e6f48f48a387add40b61a6dcd0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6840317-086a-413b-95ad-6547052ceb6a/42532277139.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_7f0416619b304a5682bafd1c9fc371bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d97b312-5fb6-4195-a6a0-7216da711b0f/semiconductor_physics_and_devices_4th_edition_solution_manual.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_05755705124f46dab3de285d92169b45.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002624d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2624D 5004 bytes
SHA-256: ad79d8873d928e985c73d9c1afebf130283395c20df26b32c306e33a2eab40a8
font_01_sfnt_off00027371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27371 10720 bytes
SHA-256: 505bccbdc8a3b8fd71d6ed6c36639ba121dec1e6dcb7bb941e872f780d51ab95

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