Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a3c7e3f1169926…

MALICIOUS

PDF

78.5 KB Created: 2021-03-15 16:35:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5684d9643e9ebf83e13e34c4421d6ac8 SHA-1: 288cb1bba68232cc74f2459f2247d9305bb550a1 SHA-256: 03a3c7e3f116992601dd55aca26b706df79858f6f9c8f72fcc779488b5b3918f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of 'utm_term' parameters in some URLs indicates a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/aws?utm_term=arduino+nano+33+ble+pinout PDF link annotation
    • http://kexolifowuj.medianewsonline.com/architecture_magazine_download.pdfIn PDF document text
    • https://bevugatumuga.weebly.com/uploads/1/3/4/3/134316863/tobak_bawit_meselozijesup_ludotuguxasut.pdfIn PDF document text
    • http://poguzozod.sportsontheweb.net/59180588719.pdfIn PDF document text
    • http://jawuxenemijofad.iblogger.org/zinexifimedariw.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/83358316437.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/kakepexepam.pdfIn PDF document text
    • http://gifebadop.iblogger.org/68139523860.pdfIn PDF document text
    • http://vinogesa.22web.org/lakebosejavejefokuminafo.pdfIn PDF document text
    • http://zenarajare.22web.org/63108851609.pdfIn PDF document text
    • http://bepebeku.22web.org/rupuladuwifo.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/pact_of_the_raven_queen_warlock_5e.pdfIn PDF document text
    • https://sodikisug.weebly.com/uploads/1/3/1/4/131437766/9985513.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/ce0208.pdfIn PDF document text
    • https://jodaxirijiv.weebly.com/uploads/1/3/0/7/130776114/80a964.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
    • https://uploads.strikinglycdn.com/files/5b95f3bd-98f8-4069-b857-957bb97651dd/lufuzediv.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/career_development_plan_sample_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b27bdc-01f9-4a89-a8fe-b68ae351c9f0/solve_quadratic_equation_by_graphing_calculator.pdfIn PDF document text
    • http://panadokopejed.epizy.com/medical_laboratory_technology_mcqs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7413963d-d822-49cc-a126-8e3f6c0d3e6e/26755345026.pdfIn PDF document text
    • http://fuvoxibid.epizy.com/zizupatebemajikonup.pdfIn PDF document text
    • http://rebogarupoza.epizy.com/olympus_om_10_lens_mount.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_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 4952 bytes
SHA-256: 423408e53e2dd84415221b519eef7a8777ce4fcacae2aa3db346b1dc467e2520
font_01_sfnt_off0000f9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F8 10788 bytes
SHA-256: 8d362d2ed1c74949b9298ada40abf75a54b1dae3e31d1f9523924f0fbad4a247
font_02_sfnt_off00011ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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