Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89c87c368770a8d…

MALICIOUS

PDF

77.4 KB Created: 2021-02-07 00:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fa566638c49a631adc70bdb87692d742 SHA-1: 7667b4eb2609bc4022fca4746fba548ee098b6fb SHA-256: e89c87c368770a8dea597581a361a4532a4fa7cb6a7abc9290131c8df85a0b60
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing campaign. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation.

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://leonvi.ru/123?utm_term=map+of+equestrian PDF link annotation
    • https://cdn.sqhk.co/zedawuzijis/eMgjDgg/billie_eilish_my_future_release_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_601911badcbdf.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/dutinovixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421333/normal_601a455487cdc.pdfIn PDF document text
    • http://xudisoda.66ghz.com/learn_autocad_2013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_6016fd7fce098.pdfIn PDF document text
    • http://belkwigs.com/the_crusades_through_arab_eyes_amin_maaloufy2yjl.pdfIn PDF document text
    • http://damvglaz6.xyz/extra_utilities_2_filteri4ds4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451363/normal_6014ecaf956ba.pdfIn PDF document text
    • http://xufozelit.iblogger.org/5440928362.pdfIn PDF document text
    • http://medyahanem.com/oakes_respiratory_care_pocket_guide8k7mr.pdfIn PDF document text
    • http://barbanapoli.moscow/fetumolewisusipmtu.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
    • http://fuvogixus.epizy.com/multiplication_and_division_times_tables_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/blank_map_of_europe_1914.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/acids_bases_and_salts_worksheet_class_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/wifi_signal_booster_apk_paid.pdfIn PDF document text
    • http://ziketikivanodiw.epizy.com/gujarat_industries_power_company_ltd_annual_report.pdfIn PDF document text
    • http://fazafowunop.epizy.com/18934699594.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/66084691837.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_off0000e629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE629 4876 bytes
SHA-256: aa3b5b847a2e7bde959a99db4dc409795a126bc0e68d61f6498168f1aa29dd61
font_01_sfnt_off0000f6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 10392 bytes
SHA-256: 70e3d7a3120eb2bca597cde16cc770837f36893f183b5c8b0a53c32fc58eeb95
font_02_sfnt_off00011a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.