Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eee897e2d0377af…

MALICIOUS

PDF

76.3 KB Created: 2021-03-25 12:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dda3c8053fc5f8c68ca4d563ea3f07b6 SHA-1: 81124c752f4a948e911a954e09109f4edddce03c SHA-256: 1eee897e2d0377af8f455d0f10f3af91615549c0a904a1167d9b6ceeb2ab50c4
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 0.9998

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://gimoguvi.ru/123?utm_term=tomb+of+annihilation+pdf+online PDF link annotation
    • http://roman-holidays.shop/the_company_of_wolves_story_summaryifm9b.pdfIn PDF document text
    • http://potolkilife.ru/carnatic_music_lessons_in_tamily5pjj.pdfIn PDF document text
    • http://pagixuzipalopa.iblogger.org/4653982162.pdfIn PDF document text
    • http://detonicinitalia.website/why_does_my_smoke_alarm_keep_beeping_randomlyp0mmy.pdfIn PDF document text
    • http://islandlandscapesbb.com/best_paid_mobile_antivirus_for_androidn9j0s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fa2862-bd16-4ca4-b42e-0de257a12c15/10943862819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862d1e35-ee58-410b-a9b6-0f12ad425167/beste_samsung_telefoon_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d49f6b-6ff7-4453-8615-60a3dfff72b2/52766561668.pdfIn PDF document text
    • http://toravapadigaw.epizy.com/area_and_perimeter_of_shapes_worksheet.pdfIn PDF document text
    • http://muvubavove.epizy.com/nawuruxitoxaxu.pdfIn PDF document text
    • http://wirudulobaga.epizy.com/pogipu.pdfIn PDF document text
    • http://tuwelifijija.rf.gd/bloody_scary_font.pdfIn PDF document text
    • http://gejuzimeru.rf.gd/31816409953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4967c0-40f6-40bd-8a5a-53be14b6156a/nhac_au_nhi_ca.pdfIn PDF document text
    • http://bogugenut.epizy.com/anhidrido_sulfuroso_en_vinos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371b4423-0c32-4498-803e-020b3c942707/best_pressure_washer_with_honda_motor.pdfIn PDF document text
    • http://diwiludoki.rf.gd/cobalt_international_energy_inc_annual_report.pdfIn PDF document text
    • http://daxipazomodej.epizy.com/dumilesowixiresiteza.pdfIn PDF document text
    • http://xasupanijit.epizy.com/completing_the_square_when_a_is_not_1_questions.pdfIn PDF document text
    • http://pinezininefos.epizy.com/28094833637.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_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 5096 bytes
SHA-256: c9e96773186df437f81b2c13aa7f941fa8e33325ba8b7b0dfd06cd6c0c8fbe66
font_01_sfnt_off0000fd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9C 11212 bytes
SHA-256: 3a6dd8ade4604f0b35fb7ff40d9f3e76ebde009ed3fb5e61632780ef87380c6f

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