Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a78b56adf50fac…

MALICIOUS

PDF

83.4 KB Created: 2021-03-18 18:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 976248787b7f19a3fea764391bf4abe0 SHA-1: 2bceb60926d19d11b54ac758856166dee27416e9 SHA-256: e9a78b56adf50fac3b2a591eb7ead3dba62124ad9e14e6db1091fd00ec79555a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL, suggesting it's designed to redirect users to a malicious site. The presence of embedded URLs further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/123?utm_term=nucleo+accumbens+pdf
    • https://static.s123-cdn-static.com/uploads/4461497/normal_5fe4bbe6b0608.pdf
    • https://cdn-cms.f-static.net/uploads/4460690/normal_6027cbe347953.pdf
    • https://cdn-cms.f-static.net/uploads/4470535/normal_60276f9a5ba8f.pdf
    • http://jusojixanona.getenjoyment.net/69639192632.pdf
    • https://gijesetezoludad.weebly.com/uploads/1/3/5/3/135348421/dugibokodepubopu.pdf
    • http://risumeboze.getenjoyment.net/descargar_libro_el_caballo_de_troya_1.pdf
    • https://static.s123-cdn-static.com/uploads/4416331/normal_6002247e48781.pdf
    • https://cdn-cms.f-static.net/uploads/4405644/normal_60279995a99ac.pdf
    • http://noxaduva.mypressonline.com/35514513209.pdf
    • https://mibonujatupogu.weebly.com/uploads/1/3/5/2/135297119/502394e.pdf
    • https://vawaxewiredeliz.weebly.com/uploads/1/3/4/8/134888027/pudafesilar.pdf
    • https://static.s123-cdn-static.com/uploads/4393370/normal_5ff3fc74bc2aa.pdf
    • http://vaxiliwu.medianewsonline.com/how_to_make_a_table_with_metal_legs.pdf
    • http://tutafukasit.iblogger.org/11799833029.pdf
    • https://dobumixil.weebly.com/uploads/1/3/0/7/130738680/dukisixup.pdf
    • https://static.s123-cdn-static.com/uploads/4375087/normal_6008a09874505.pdf
    • http://ritibaj.22web.org/directors_loan_on_balance_sheet.pdf
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fe1ee3d83606.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sotatelovutegep.epizy.com/airplane_simulator_free_for_android.pdf
    • http://bilunijo.epizy.com/sezofulupu.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/zubumaveputagiko.pdf
    • https://s3.amazonaws.com/fuvidokibet/what_do_the_chrysanthemums_symbolize_in_odour_of_chrysanthemums.pdf
    • https://s3.amazonaws.com/jufowokedunod/74216788617.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_off0001048b.bin
f852387d6f00484e4a894a2eff505eec9543f0de5f66e4648fb5f18609754f3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 5312 bytes
font_01_sfnt_off0001168f.bin
a2db994c7138aa643fc038487c221148bc5ac1cce660addee7c035fd9c97fd66
pdf-font-stream PDF embedded font (sfnt) at offset 0x1168F 12296 bytes