Malicious PDF — malware analysis report

Static analysis result for SHA-256 a351de9f2500a2eb…

MALICIOUS

PDF

65.3 KB Created: 2021-04-05 22:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de05f3a6b2effcf2b398a380c05a596c SHA-1: dd6fb44a0769f2173b874b416ae35120ed8276f5 SHA-256: a351de9f2500a2ebc67231578fe2ce70f91d19df084bf48d22ca18b9306e1f30
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'soxebez.ru', which is likely the primary distribution point for a malicious payload. Although no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to trick users into downloading further malware.

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://soxebez.ru/award?keyword=allan+kardec+o+livro+dos+espiritos+pdf
    • http://zeridojatis.iblogger.org/yamaha_motif_xf8_88-key_synthesizer_workstation.pdf
    • http://vojidovalo.iblogger.org/how_to_graphic_design_a_book_cover.pdf
    • http://kisedevobale.22web.org/shona_bible_free_download.pdf
    • http://snail-case.store/gumebebi69ldy.pdf
    • http://fikapopupalake.iblogger.org/zedasa.pdf
    • https://xokebewogaxuwu.weebly.com/uploads/1/3/4/5/134588239/3320219.pdf
    • https://botosedasirewen.weebly.com/uploads/1/3/5/9/135961685/03990.pdf
    • https://vatanivirasuta.weebly.com/uploads/1/3/5/3/135387760/8652661.pdf
    • https://cdn-cms.f-static.net/uploads/4473359/normal_60504776151ae.pdf
    • https://xeraxoxatetubus.weebly.com/uploads/1/3/5/9/135993523/befbca89.pdf
    • https://cdn-cms.f-static.net/uploads/4468289/normal_6047ee5c7a988.pdf
    • http://medway24.com/police_reportz3c4e.pdf
    • http://abistrans.ru/besetopezovegixowopujibattta75.pdf
    • https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/bajupit.pdf
    • https://cdn-cms.f-static.net/uploads/4473049/normal_600fbff5a0460.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pibagejebex.epizy.com/taxonomy_of_educational_objectives_affective_domain.pdf
    • http://xuvanemesu.rf.gd/fidufilemixafufitepo.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_off0000bfd7.bin
41b24e4568ea0f5a60572f13441a479401f0760f8323d4dc1dc909f86db6d203		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD7 5264 bytes
font_01_sfnt_off0000d1da.bin
231c4fd60707cc7ddac935775595b081834111615ca72d4447721863602956e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DA 12056 bytes

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