Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d409793ee61eaab…

MALICIOUS

PDF

74.8 KB Created: 2021-03-14 05:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3781ca0108989c9794c3f114c1a6d0ed SHA-1: bf44a34f803250015c58b4ba680f00bbb00a89c1 SHA-256: 7d409793ee61eaabacfe1e19bb90dba1d87b6514c851660d8ff84a2d79754691
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, including a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though obfuscated, suggests a lure related to business templates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=business+model+canvas+google+docs+template In PDF document text
    • https://cdn.sqhk.co/senuziker/bWiejcA/my_assistant_history.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/jVfpPq6/53949596890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_6014cd887dee5.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/mobile_app_development_basics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_5fe8e2c45cc52.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/jebaxitubipujutavolob.pdfIn PDF document text
    • https://cdn.sqhk.co/gogefaman/eK5WZO3/widonutazufatumanejud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_601f1c8cee9f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_60253400a1faf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381105/normal_5fc630fd031c9.pdfIn PDF document text
    • http://metazexepajesen.22web.org/endurance_technologies_limited_annual_report_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/besimiwi/ujgRjbw/finding_blue_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/agf4hfb/nejuwozutezinilomutexasin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gifimedirawi.epizy.com/avicii_without_you_song.pdfIn PDF document text
    • http://mezigozogug.rf.gd/what_are_the_advantages_of_wind_energy_conversion_system.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/canon_in_d_violin_sheet_music_solo.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/lafarge_malaysia_annual_report_2014.pdfIn PDF document text
    • http://lavovexerok.epizy.com/adk_map.pdfIn PDF document text
    • http://bopefurolo.rf.gd/sufibidorezilizepoxulewew.pdfIn PDF document text
    • http://debetofewozuri.epizy.com/protective_life_insurance_beneficiary_designation_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/bribie_island_fishing_report_july_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/lazoxotuteweni.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/motor_vehicle_accident_report_form_template.pdfIn PDF document text
    • http://zazujipediwa.rf.gd/rujimopenizud.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_off0000e873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 5404 bytes
SHA-256: ff94526bb21fac45853998fd38e6596264a6f7f0fb0432f0c55365bb8e3f8946
font_01_sfnt_off0000fad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 10460 bytes
SHA-256: b232db977aa7790e8a4c0e68d8e3f9336ef3aacb6e502fe5c71475aab9a5b293

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