Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecf13c79f2c0d6b…

MALICIOUS

PDF

75.2 KB Created: 2021-03-16 04:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c1185f7b8e4117ef54271616feedbf2a SHA-1: 51fdcd7fa2a788efee235c222e481bf715d0645d SHA-256: 5ecf13c79f2c0d6b7281f52601192d1bfe0c43cfb848d7eef76055ce0b9bcd5e
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://druttle.ru/wix?keyword=prince+william+on+tour PDF link annotation
    • https://cdn.sqhk.co/niduzabunu/bheijws/runnings_hours_brookings_sd.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/vUrdKgd/windows_server_2016_remote_desktop_connection_limit.pdfIn PDF document text
    • http://neguzoni.22web.org/pijepazovezuxuloviw.pdfIn PDF document text
    • http://tenakororor.iblogger.org/curriculum_vitae_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/SJcBjax/message_tones_free_download_funny.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/iaCiiha/35964165947.pdfIn PDF document text
    • http://gufubugab.22web.org/15395998390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_6014f31761ff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_604203996fbe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390661/normal_5febeacfd4752.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/uthfhdv/n64_emulator_ios_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pilevujomeludo.rf.gd/nolodamiwazixozajetowewaj.pdfIn PDF document text
    • http://gateguka.epizy.com/1568664245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e49940ce-f110-470d-b0c5-19e6bc59d449/8678385164.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_55bc6054e1a54fbaba6f82b35cf5eca6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86572bbe-9b90-4461-972f-3ee81ada7b02/gorulowevuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35303ffb-20a7-420e-99e7-e20ecf615cc1/10426142413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ffe61f-1f14-4bbc-a9d6-74afc34cffa2/why_isnt_my_whirlpool_refrigerator_cooling.pdfIn PDF document text
    • http://rijewetevoxo.rf.gd/ziroxudavetixaxikoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a078caf7-c5ba-43eb-992c-96f76ba57849/are_canon_lenses_compatible_with_sony_cameras.pdfIn PDF document text
    • http://luturuwuxas.epizy.com/the_last_airbender_movie_in_tamil.pdfIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_6a31cb39d19443228f1adffda9d6599c.pdf?index=trueIn PDF document text
    • http://pefafimu.rf.gd/intellij_jasper_reports.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_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 4860 bytes
SHA-256: 747a002dcb17cfdd348780790a578c2f1aae9206c7dd431be4410d40e11bb1c8
font_01_sfnt_off0000fb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB42 10772 bytes
SHA-256: 642931308f724118b7f54764e3563c051e0e92be6b0a54204cca2d0626435622

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