Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9ab8866679899e…

MALICIOUS

PDF

77.8 KB Created: 2021-04-04 17:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f384ce8431bad11a73088a1345c8afb7 SHA-1: 9275a4c9652e76806dbbe9c45d0217bc3e7b9161 SHA-256: 4b9ab8866679899e4cc38e90d443bf3f5e2e6094c51bbe0d63b7b262a3722bb1
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to phishing sites, as indicated by the 'PDF_URI' and 'EMBEDDED_URL' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into visiting a malicious site for credential harvesting or malware download. No scripts were extracted, but the presence of multiple external URIs points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/aws?utm_term=john+deere+345+weight+bracket
    • https://nanagupuwaxa.weebly.com/uploads/1/3/5/3/135322083/e7d9d5a39855c3.pdf
    • http://aromaita.space/495350027d94tj.pdf
    • http://urologo.store/eureka_enviro_steamer_313awn6gx.pdf
    • http://3gusevshop.website/414599719466erbr.pdf
    • http://gnoogle.site/juegos_de_hombre_araa_para_descargar_gratisvf0s0.pdf
    • https://cdn-cms.f-static.net/uploads/4465149/normal_60165fae572af.pdf
    • http://bedebatosisazov.22web.org/chuyn_i_t_file_nh_sang_word.pdf
    • https://jikurufor.weebly.com/uploads/1/3/4/6/134613562/votitegere.pdf
    • https://cdn-cms.f-static.net/uploads/4380876/normal_60494889aa530.pdf
    • https://cdn-cms.f-static.net/uploads/4485943/normal_6025065678f20.pdf
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/fivelosezodemesova.pdf
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/8960173.pdf
    • http://hamlikjorettoop.ru/jozidomurikz5en.pdf
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/5012390.pdf
    • http://berkeciftci.net/62939664133j4n5.pdf
    • http://interbankdigital.com/12884352763j18tg.pdf
    • http://lidlid.xyz/74014914786f7u2n.pdf
    • http://ig-soft-team.com/basics_of_molecular_biology_bookhc6hb.pdf
    • https://purubagenipobeb.weebly.com/uploads/1/3/1/3/131398544/7608015.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zamutuxagen.epizy.com/white_rodgers_thermostat_battery_died.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_off0000f001.bin
3c19c4fe292212cdae0d0e85a277cfff444e4c54c5f4db16786d65d09c987cf3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 5652 bytes
font_01_sfnt_off00010357.bin
26e425ca9c910e72470d67e9c299868c90480b1807e36e80ac76104fe2d49954
pdf-font-stream PDF embedded font (sfnt) at offset 0x10357 11640 bytes