Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b4cc992661bd86…

MALICIOUS

PDF

85.3 KB Created: 2021-04-10 06:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ee4268dd1242fc6d590c09a0342bba0 SHA-1: 6c322b2e2373ea966939f24dac06ad455b576b2d SHA-256: 64b4cc992661bd866debc30aa5185964a2257d987177824d6e59d713ee950b8f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, suggesting it is designed to redirect users to malicious sites or download further payloads. The presence of these URLs and the overall detection score point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=world+mythology+textbook+pdf
    • http://onlinetiser.website/23480576978k38q3.pdf
    • https://doxugibako.weebly.com/uploads/1/3/0/7/130776338/2908321.pdf
    • http://lnstagram-copyright-supports.com/leadership_skills_questionnaireoaslr.pdf
    • http://study-english-04.space/trial_xtreme_4_bike_upgradesf0hio.pdf
    • https://cdn.sqhk.co/dosazuleg/ifiad5r/44212116560.pdf
    • http://tonerinkstore.com/eating_disorder_definition_world_health_organization9dqow.pdf
    • http://it50disconto.pro/36822669371gii2p.pdf
    • https://pebabozepevi.weebly.com/uploads/1/3/5/9/135966679/fobun.pdf
    • https://static.s123-cdn-static.com/uploads/4451033/normal_60048ca41c0ca.pdf
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/zamezilekofo.pdf
    • https://cdn.sqhk.co/javeduner/7757hie/govunuzesonowunon.pdf
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/08b6df5.pdf
    • https://static.s123-cdn-static.com/uploads/4426942/normal_5ff846bc7f5cb.pdf
    • http://life50it.pro/badass_celtic_names1ftrr.pdf
    • https://cdn.sqhk.co/vakiduju/hjdgd5m/alchemy_leveling_guide_ffxiv.pdf
    • http://teatr-art.com/fibosotujutamaripofajeg7lv3x.pdf
    • https://static.s123-cdn-static.com/uploads/4412894/normal_5fec2f307b45b.pdf
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/xafug-nodej-gujevujujajakub-rowaj.pdf
    • https://cdn-cms.f-static.net/uploads/4486215/normal_5fd929a8a7f5c.pdf
    • https://cdn.sqhk.co/vumatoxikom/hehijed/guns_mods_for_minecraft.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jidafamibudajir.epizy.com/18072840282.pdf
    • http://dolipunifaz.epizy.com/why_is_my_iphone_11_stuck_on_the_startup_screen.pdf
    • http://kojexeruxub.epizy.com/dokokuradubep.pdf
    • http://belepegaxotimi.rf.gd/nogapubakuxoni.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_off00010d49.bin
721672ad9611fc9505401160471390ceb849b7822e5ca04227835854f4e05382
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D49 5456 bytes
font_01_sfnt_off00011fc1.bin
3059e45241fe039796af4d2c85a5008889c4f915a2866faa083f57413b58547a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC1 11616 bytes