Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d44559afb473694…

MALICIOUS

PDF

71.5 KB Created: 2021-02-22 16:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 475503631589719c7519d850c67f50d5 SHA-1: 4151b221666742b0168c51c2f4a5b2c6900d2474 SHA-256: 2d44559afb473694f1c9faa2871a12914289a4256c563724d0264fc5f7a0b55e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site or download further malicious content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=ley+de+condominios+2020+ogp
    • https://cdn-cms.f-static.net/uploads/4405420/normal_6027bf6187a92.pdf
    • http://fevumajugo.iblogger.org/on_green_dolphin_street_alto_sax.pdf
    • https://robidolaw.weebly.com/uploads/1/3/0/7/130776002/cdfcd027abfec.pdf
    • https://cdn-cms.f-static.net/uploads/4470828/normal_601e666b7cd3b.pdf
    • https://favopitovuseb.weebly.com/uploads/1/3/4/4/134455409/daef966c1eeb38c.pdf
    • https://cdn.sqhk.co/saligoliti/7BgfihJ/gidalunux.pdf
    • https://cdn-cms.f-static.net/uploads/4485450/normal_5fd95a9f4730b.pdf
    • http://tederurokeroga.iblogger.org/kazisigazowawidek.pdf
    • https://static.s123-cdn-static.com/uploads/4469355/normal_5ffb69cb24e5c.pdf
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6010c90d5b7dc.pdf
    • https://cdn.sqhk.co/marebilan/idC1Vja/bazusijegalovejurujeteke.pdf
    • https://wegudogixudefup.weebly.com/uploads/1/3/1/4/131438345/tagofiv.pdf
    • https://static.s123-cdn-static.com/uploads/4417206/normal_5fedfd96df5bd.pdf
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fcceefdc246e.pdf
    • https://pegojuzifaxoda.weebly.com/uploads/1/3/5/3/135309499/7a4f8b035b8.pdf
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/guxirutesizav.pdf
    • https://cdn-cms.f-static.net/uploads/4452169/normal_5fe8399a4e123.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nivemod.epizy.com/fuginovekolawapadifuxal.pdf
    • http://rugeritubaduw.epizy.com/naxovo.pdf
    • http://nolumer.rf.gd/where_is_the_drain_on_a_whirlpool_washing_machine.pdf
    • http://pelubameta.epizy.com/autobot_arcee_transformer.pdf
    • http://tefuguwo.epizy.com/excel_merge_two_sheets_based_on_column.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_off0000d782.bin
a9a6adb4094a25014967158a1567975ebd7fae3695889935c0552dfa28a3e754
pdf-font-stream PDF embedded font (sfnt) at offset 0xD782 5372 bytes
font_01_sfnt_off0000e9d2.bin
813e7b2b20b56cbb19e36013e900b230165ef3bd23379c53e7b908bd5357635c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 11444 bytes