Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8adea0865901da4…

MALICIOUS

PDF

76.6 KB Created: 2021-03-19 02:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a28243366a34432da562c295bdb4c1b9 SHA-1: 9a33079057f284271a6d063f2aded258633f56d8 SHA-256: e8adea0865901da43d25160d9ef08a407337e8c8f4b96190de154b81123f8e57
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with one prominent URL pointing to 'baarspo.ru', which is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous links and the overall heuristic analysis suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=simplifying+expressions+with+distributive+property+worksheet+pdf PDF link annotation
    • https://dasufurejer.weebly.com/uploads/1/3/0/9/130969026/a40736f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452626/normal_602b2e3d1638f.pdfIn PDF document text
    • http://tepexew.iblogger.org/wiloxininig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_602ab899c33eb.pdfIn PDF document text
    • http://logowafimu.22web.org/business_email_templates_free.pdfIn PDF document text
    • http://numupizor.22web.org/kixufedawezosetegezabode.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/d2af576a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_60129633770c8.pdfIn PDF document text
    • http://dinodosum.iblogger.org/4638994542.pdfIn PDF document text
    • http://maretexojud.66ghz.com/nelilonudifuserid.pdfIn PDF document text
    • https://gulufoge.weebly.com/uploads/1/3/0/7/130776817/xonejamujatade.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
    • https://uploads.strikinglycdn.com/files/47f7a29f-eaa6-4698-8769-0593a046b482/febo_flame_electric_fireplace_problems.pdfIn PDF document text
    • http://nanejidemimoke.epizy.com/48153787955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39e4ca9-e933-47b7-b3f4-9bc0b43a1d48/dbt_training_workshops_2020_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d258d23f-9ef5-4676-8bcd-972e95e9c6af/windows_sbs_2011_standard_console_has_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f65697-44a4-42c0-b7b7-7e68819a2394/54352071343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fd539e-0a2a-4eb3-b987-a9b7a637ea4b/how_did_obamacare_get_passed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1cb718-e20e-4af1-83ef-a472599bef3e/maschine_studio_software_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e4a70f-9cca-4623-9224-6d816c911e80/27117882510.pdfIn PDF document text
    • http://filabos.epizy.com/68742815375.pdfIn PDF document text
    • http://judomoposigu.rf.gd/principles_of_computer_architecture_murdocca.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7D 5756 bytes
SHA-256: 27feec5a1154d23e4c922ab73758d41ed60f6fc87687313ddda30a418e99b423
font_01_sfnt_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 11040 bytes
SHA-256: d2f8ecd4f7f6cb302519b04128f0cbd9f5c015446cb0881e82026a863d676197
font_02_sfnt_off00011402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11402 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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