Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ed006e525ca8c8…

MALICIOUS

PDF

81.2 KB Created: 2021-03-14 17:36:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e0dbad223d83de26282cebdecbeded4 SHA-1: d205c63fded2c56b71af980590bc31ebeb8b77d1 SHA-256: 52ed006e525ca8c8a01ec76a97228a926b14fd4c8feb2f1779890baf64a3c444
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high number of unknown reputation URLs strongly indicate a malicious intent to redirect users. The ML classifier and ClamAV detection further confirm the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://leonvi.ru/strik?utm_term=frost+nixon+movie+trailer
    • http://sallles.ru/volkswagen_transporter_type_2_workshop_manualacdpw.pdf
    • http://hr-insider.com/the_shark_and_the_sardines7ie5m.pdf
    • http://loveantravel.xyz/nesogixobogarofuzisufokc9c2h.pdf
    • http://edalovert.xyz/ielts_speaking_practice_test_with_answersbpb38.pdf
    • http://glossywp.online/sportster_service_manualsa90n.pdf
    • http://egrn-order.online/renatevigz5u7.pdf
    • http://yesitalia.fun/nea_marin_miliardar_film9hq87.pdf
    • http://jomufobi.iblogger.org/ncert_biology_book_class_9.pdf
    • http://kuzojud.66ghz.com/iliamna_air_guides_alaska.pdf
    • https://cdn.sqhk.co/vasegodesazu/JhcDgiM/car_mod_for_minecraft_education_edition.pdf
    • https://cdn.sqhk.co/zogobadakedu/A1jfgi1/megan_is_missing_full_movie_gomovies.pdf
    • https://cdn.sqhk.co/wibononuve/f2tjb3Z/sibibuzojabenineb.pdf
    • http://national-verifyteam.com/jolly_phonics_first_sounds_worksheetsvbkpx.pdf
    • http://dobikan.22web.org/dugapekavivodofipujajaru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_3ebc4093836c421194bd4c5f73b47239.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ae6e3016-c16f-490e-b3ce-932446f2115c/icewind_dale_enhanced_edition_multiplayer_issues.pdf
    • http://turizavoge.epizy.com/kivemejagujafinab.pdf
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_f169662ab5554f5caf27c0c7e85300fd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0a960c58-56d7-4f7a-8d20-ed6297138b14/how_to_ask_allah_for_a_good_husband.pdf
    • https://uploads.strikinglycdn.com/files/5a5d8bd4-7751-4758-aa8e-b37f8717c22b/amazon_software_development_manager_iii_salary_india.pdf
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_54585d654dd340f39b035c936c774a1d.pdf?index=true
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_6b929513578447ad9fdab69777f0a967.pdf?index=true
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_d63c5a482529420c9563a24555ac19b7.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f119.bin
6fa250a226a33ca54261d57b0aa491f8834da591b1bd2c724b9d15aad377f2b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 4700 bytes
font_01_sfnt_off000100f0.bin
e4702f2ed54ff2babed21a1c754199dc8f147ab19524b4c735a4897ad15d2e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100F0 11504 bytes
font_02_sfnt_off00012803.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12803 4324 bytes

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