Malicious PDF — malware analysis report

Static analysis result for SHA-256 948b3843352daad3…

MALICIOUS

PDF

83.1 KB Created: 2021-04-02 02:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0b352c9bae58c1b7366d472aa635c219 SHA-1: 0ebf5b9b34217f397a5e2c18989764919d0b1d36 SHA-256: 948b3843352daad36b7cf12e0ca72939998dba63eda4edae7d5a48cfc78ef697
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=game+avatar+mod+apk+offline PDF link annotation
    • http://j3vnci4.xyz/72608261248kfq0u.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/anthem_for_doomed_youth_analysis_line_by_line.pdfIn PDF document text
    • http://seamanygau.best/goalrilla_basketball_hoop_instructionsmxr97.pdfIn PDF document text
    • https://cdn.sqhk.co/jaselavujuwi/Yidd5Rh/ivan_barbashev_scouting_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406777/normal_5ff296c01f87c.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/eijggib/soundcloud_android_upload_failed.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/33403868770.pdfIn PDF document text
    • http://zisapawiwako.mypressonline.com/derivatives_and_alternative_investments.pdfIn PDF document text
    • https://cdn.sqhk.co/xawowatu/avRYQXj/clash_of_clans_unlimited_troops_hack_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_600309111564a.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/84952486848.pdfIn PDF document text
    • https://filududo.weebly.com/uploads/1/3/5/3/135390237/775202.pdfIn PDF document text
    • http://cashbackk.site/pukemugerozatelawaraxizicsxkg.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/gezgihg/fabimekoxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473616/normal_5ff675550ec41.pdfIn PDF document text
    • https://cdn.sqhk.co/lemisobe/ighjalJ/carplay_app_for_iphone.pdfIn PDF document text
    • https://meripowubizaj.weebly.com/uploads/1/3/5/9/135959363/81edae212b.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/jeevan_saral_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_6042d1dc50d8e.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://vorisenunajix.myartsonline.com/guzukezeropemixokoboj.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/luruvifizaz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 4952 bytes
SHA-256: c7fcb04d6f65ef78149038d2ac6593e645fcd93c83263fb5ebdf39361a56c726
font_01_sfnt_off0000f382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF382 10992 bytes
SHA-256: ed36db2df98dbfdaaa23b904a5c0dc8eecf73965a6c0bf735d49f9fe5457e4e7
font_02_sfnt_off00011932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11932 17332 bytes
SHA-256: c4df5b52f6501af682d10560b36d68d7eb17fe8072752455bb832618e6ae245e
font_03_sfnt_off000130d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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