Malicious PDF — malware analysis report

Static analysis result for SHA-256 25514e5fe4db9604…

MALICIOUS

PDF

75.9 KB Created: 2021-04-05 12:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bdf290d8a8fc87055bc700bd9cde086d SHA-1: 57b00b25b6144cf674be9358cfad8d6d77f0d276 SHA-256: 25514e5fe4db960489ddb7f674a770004eec58a5149c9a8a0b3fe23770f0ca24
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 0.9993

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=peer+review+essay+worksheet PDF link annotation
    • http://goxivomibivufuv.mywebcommunity.org/limafifapifupa.pdfIn PDF document text
    • https://cdn.sqhk.co/razulati/hdjdAij/sunset_restaurant_diner_brooklyn.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/jgiiohj/move_to_ios_not_working_on_lg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493579/normal_5ffeb2a89a0d5.pdfIn PDF document text
    • http://bajesiradevo.getenjoyment.net/algorithm_complexity_and_time_space_trade_off.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/boy_scouts_uk_near_me_oregon.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/IhhygiG/bazezojuduvedefesop.pdfIn PDF document text
    • http://bawimip.sportsontheweb.net/43520808377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_604de90d019b6.pdfIn PDF document text
    • https://cdn.sqhk.co/miweguzeg/f8l3jeN/42170971082.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/kaloduv.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/catalogue_distribution_electrique_schneider.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gepivefukusi.atwebpages.com/architectural_drafting_and_design_7th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4bd7548-36f4-46db-8db8-28052b499cae/how_to_smoke_a_turkey_in_a_brinkmann_electric_smoker.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/application_of_coumarin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8842d64b-415e-4837-8e6b-6e4ab93bc508/troy_bilt_horse_bolo_tines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83482881-0944-435c-a4dd-5887900d7368/tadezadolazuxusesorag.pdfIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_eb9206bf55604ec5865fea1c2c1bc0f9.pdf?index=trueIn PDF document text
    • https://b23ebcb4-2e41-4c68-a408-584c84124782.filesusr.com/ugd/5a2446_9eb5d7b9725f4cc7adf559c87f7ba1af.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_ebd0dffa115a46d297ada42ed7553f42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5e1c35-5574-4af4-b873-6c5bb2c381f8/65502755045.pdfIn PDF document text
    • https://1f9cfe0c-d655-4514-b58a-75380282e405.filesusr.com/ugd/d31784_cb26f1fb6f8a4797a8513e91043c9d88.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d36f19dd-e8a3-47b5-b095-d1d90c8f7011/89177159090.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 5060 bytes
SHA-256: c19329a3e964a1ed15c10116f376a2223358de92deba81a1a9e293fbfb8c794d
font_01_sfnt_off0000fe27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE27 10724 bytes
SHA-256: b41ce982d3f366ef6619770e36fc55b0537a29a44d39219a4b3b3fd0bc70e1bf

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