Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a3ae26bf948a23…

MALICIOUS

PDF

93.9 KB Created: 2021-03-05 08:17:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e839253dea1fbe46524cd155ce1b51ed SHA-1: 9e70a0206696b94692d31575dae28010dbf447b2 SHA-256: e4a3ae26bf948a231e06b9788fabcecb0b7e84eee89dcdc27ce7b5ba05c90095
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 0.9992

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://vilenefex.ru/wix?keyword=tree+of+savior+shinobi+guide PDF link annotation
    • http://moradudipomibo.mypressonline.com/work_power_energy_review_worksheet_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480898/normal_5ffc88be51a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_6028c2c88ac1b.pdfIn PDF document text
    • http://teren.fun/847089231080axyy.pdfIn PDF document text
    • http://nextauto02.ru/weather_report_bihar_arerajekf38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_6022b0c3f0c35.pdfIn PDF document text
    • http://busforpay.online/79150904887nl3v.pdfIn PDF document text
    • http://dle-tpl.site/what_is_the_theme_of_the_poem_the_sun_rising0czoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_600aadb4ec449.pdfIn PDF document text
    • http://faceit.su/que_significa_cuando_sueas_embarazoaf17l.pdfIn PDF document text
    • http://batmbatm.ru/72017844983oiagv.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/twilight_book_cover_collection.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/xolorilm9q63.pdfIn PDF document text
    • http://auto-agents.space/62259443166idjh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462354/normal_6019fd107a8da.pdfIn PDF document text
    • http://moneyindia.site/eleventh_hour_cissp_3rd_edition_downloadnw3lx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/dymo_label_software_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/209908ff-ead7-46ab-ae4c-002dba4b2e3e/la_siesta_del_martes_resumen_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de99616-a175-4078-b0d0-17e978560f56/napoleon_hill_quotes_success.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ce18c8-fdee-4da4-9c36-afb0310285f9/quadrafire_mt_vernon_thermostat_problems.pdfIn PDF document text
    • http://mepitar.atwebpages.com/what_does_a_septic_drain_field_look_like.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/tegexoralewomow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbead952-2350-4dda-b024-3be1181b3cdc/nikon_d5200_battery_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/torukura.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_off0001347a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347A 5284 bytes
SHA-256: 8560dbbad9dde0c19321941d30f81e431f56298a1dbe4185d1081793c017bc71
font_01_sfnt_off00014676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14676 10520 bytes
SHA-256: a3e014dd5c42039b2c75e18fd70dbc8148612086bf2bf2d5afd0df9be9aa8c0a

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