Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0cfe5b92211111f…

MALICIOUS

PDF

97.8 KB Created: 2021-03-26 03:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01d0d76ca9ba8e4463324c8ef5d87e1 SHA-1: ef3042852da785594aafe10749de7d47f194624f SHA-256: a0cfe5b92211111fcf5c3dfc7ce9a69c9303fdb170a8b917b2ce0901f08a00e6
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojanized PDF. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, suggests a lure related to 'latent tb infection' and mentions 'award', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/award?keyword=latent+tb+infection+pdf
    • http://migerov.xyz/dojitedikopmfpm3.pdf
    • http://nelefir.22web.org/body_parts_printable.pdf
    • https://cdn-cms.f-static.net/uploads/4447467/normal_5fd266763620e.pdf
    • https://static.s123-cdn-static.com/uploads/4474720/normal_6005ed717e9b2.pdf
    • http://lnstagramverificationbadge.com/formation_adjectif_verbal_latintbw2k.pdf
    • https://static.s123-cdn-static.com/uploads/4426944/normal_5ff5deb9490fd.pdf
    • https://cdn.sqhk.co/nimabugokofa/gehjicI/mixurol.pdf
    • http://xokujipi.22web.org/86707887166.pdf
    • https://cdn.sqhk.co/kadukugobug/hevGjjj/lukajefofe.pdf
    • https://cdn-cms.f-static.net/uploads/4490739/normal_6012d95ace0bd.pdf
    • https://cdn.sqhk.co/barugogip/igjbRhe/service_projects_ideas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mituzoleti.epizy.com/86173167366.pdf
    • https://uploads.strikinglycdn.com/files/85fb9573-8b11-4399-ba92-3d41c39c931a/sopa_de_letras_para_imprimir_para_nios_de_primero_de_primaria.pdf
    • http://gerabar.epizy.com/aqualung_tab.pdf
    • http://xapuzafuzokuw.rf.gd/xujinopaxeloruw.pdf
    • https://uploads.strikinglycdn.com/files/a16680bd-c529-45f6-851b-51a113f79f45/vowavojanumosiv.pdf
    • http://nikinemum.epizy.com/93988357573.pdf
    • https://uploads.strikinglycdn.com/files/d29b085b-7fbf-4b26-b915-2000c049c4dd/rumutasoki.pdf
    • http://mafakizukizunof.epizy.com/how_much_are_wii_u_consoles.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_off000140c2.bin
2286bca30d2dc5af3593980f6ef563ddda050a0ff83cf03f73b41a0c172dea74
pdf-font-stream PDF embedded font (sfnt) at offset 0x140C2 4924 bytes
font_01_sfnt_off00015199.bin
36e83004759617d872ce2c5caec3b5ecc24e4e3a686c51dda6b4fa13e1c2b843
pdf-font-stream PDF embedded font (sfnt) at offset 0x15199 12708 bytes