Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eeea0808b8e49d4…

MALICIOUS

PDF

77.9 KB Created: 2021-03-20 01:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3907b797ec42dcaa309688ca8871c9bb SHA-1: c4363f78cd6c32735d10517f8bc102a845f2e742 SHA-256: 6eeea0808b8e49d4c78f81f85bc29c1954790291e5ee46c01060162bd8a8d784
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest an attempt to redirect users to malicious content or phishing sites. The primary attack pattern involves leveraging external links to compromise users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=audi+a5+mmi+navigation+plus+manual+pdf
    • http://health-top.ru/mi_note_4_launching_date_in_indialyzgn.pdf
    • https://cdn.sqhk.co/rokogikapo/ajfjdia/play_cats_online_free.pdf
    • http://podarokinsta.online/what_is_the_functional_analysis_in_sociology862ki.pdf
    • https://cdn.sqhk.co/vabalogu/jfiiejh/tetudupewonu.pdf
    • http://easylearning.space/dunkin_donuts_drink_nutrition_factsnqyei.pdf
    • http://lg-supportteam.com/cartomancy_multiple_card_meaningsrhhq6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dojomasamolazib.epizy.com/tefezexopitikufe.pdf
    • https://uploads.strikinglycdn.com/files/c7dec20c-1783-4273-a99c-a12e1f48740a/how_to_use_frosting_tips_on_cupcakes.pdf
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_0358e58472e348b485030d517e10aca3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/330c7369-1258-4d1c-93eb-fffd50f33b23/sozajuwid.pdf
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_91317ecad2ce448297efa243be464f45.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eececefc-1030-4491-9f8f-4614fa766d71/watch_the_game_plan_on_netflix.pdf
    • https://uploads.strikinglycdn.com/files/3fe8ca96-ab47-4ab4-bd74-8deca6a8a50d/24700881463.pdf
    • https://uploads.strikinglycdn.com/files/186c1e33-da9d-4285-b9e1-c84f7b2db044/woods_model_50008_timer_not_working.pdf
    • https://uploads.strikinglycdn.com/files/6429445a-71b4-4750-9fd1-fa3e9e68de04/89803437946.pdf
    • https://uploads.strikinglycdn.com/files/4b6989e9-effb-4954-92b8-a913cf11a532/are_panasonic_batteries_rechargeable.pdf
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_b173daac5ff24743a9338a88bd0637c6.pdf?index=true
    • http://xijukogejutaril.epizy.com/south_dakota_weather_report.pdf
    • http://femasusatatovet.epizy.com/tilakenufabizikirakaxo.pdf
    • http://jiboleramar.epizy.com/uk_breaking_international_law_explained.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ba.bin
3715a23def81cadad3f2e0178dd2efc68bb7d136ee9bbf5515d88b5e3f666d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 5440 bytes
font_01_sfnt_off0001063f.bin
6fe24f9abcd862b5ae9536eeaf1693f7fd14c20fc597338436795a11e7e6c74b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 10532 bytes

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