Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b0e8ef1f171dba…

MALICIOUS

PDF

83.5 KB Created: 2021-03-18 20:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bccc441994819df5fed295d0db870f40 SHA-1: b5c3f0906ab6363205263d5f8c5028095996fb34 SHA-256: 16b0e8ef1f171dbae6c0df3f07506ab0b8df005f9d115c696b9057ed4630c942
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL, likely intended to trick the user into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an external URI points to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://maypoin.ru/award?keyword=achilles+tendinopathy+pdf+exercises
    • https://cdn.sqhk.co/guzoladip/ieXgi3f/10240302364.pdf
    • https://rujafamuzesoka.weebly.com/uploads/1/3/5/3/135339602/7f0621f46.pdf
    • https://static.s123-cdn-static.com/uploads/4484126/normal_600109baed303.pdf
    • https://lizelizana.weebly.com/uploads/1/3/1/4/131409616/mumininuf_pavug_mufajiditi.pdf
    • http://xonibiz.22web.org/dukimajininalur.pdf
    • http://wuxifev.iblogger.org/madonapakatifupegi.pdf
    • https://cdn-cms.f-static.net/uploads/4366063/normal_601152dca7483.pdf
    • https://static.s123-cdn-static.com/uploads/4409258/normal_6000209238999.pdf
    • https://cdn.sqhk.co/surodamiz/cLji6if/gubinuxomanegezowodubi.pdf
    • https://static.s123-cdn-static.com/uploads/4416660/normal_5fdcb5f843525.pdf
    • https://nofitipofawotuj.weebly.com/uploads/1/3/4/0/134012335/kodovutozep-suwidenav.pdf
    • https://cdn-cms.f-static.net/uploads/4479688/normal_601183a660817.pdf
    • https://cdn.sqhk.co/bexexoro/hhehjLL/furia_de_titas_3_dublado_download_utorrent.pdf
    • https://cdn-cms.f-static.net/uploads/4416316/normal_603a3fa538cc0.pdf
    • https://cdn-cms.f-static.net/uploads/4380226/normal_6048d08cb3312.pdf
    • http://lurodug.iblogger.org/successful_algorithmic_trading_free.pdf
    • https://vevusivo.weebly.com/uploads/1/3/0/8/130874001/1a32a5dbdcefa1.pdf
    • https://cdn-cms.f-static.net/uploads/4392193/normal_60331136e8062.pdf
    • http://viputixezererej.66ghz.com/38835354239.pdf
    • https://cdn.sqhk.co/dujagazatad/Shgjhge/wosubisul.pdf
    • https://cdn-cms.f-static.net/uploads/4404296/normal_60347aa148fe1.pdf
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6017d60fe2a77.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xezeruv.epizy.com/96978234894.pdf
    • http://xikisefux.epizy.com/abilene_reporter_newspaper.pdf
    • http://xodepew.epizy.com/do_lawrence_and_holo_get_together.pdf
    • http://mujunuge.rf.gd/gizewaguvar.pdf
    • http://wavudipikudela.epizy.com/vasawadowajo.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_off000106d2.bin
91c49c03b93b0d02fb17d45dbf9bb7a63e440a4c703014f4a1b1989cda171510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D2 5400 bytes
font_01_sfnt_off00011940.bin
b694657ac1ccc03b3d94f554d1df84dbc192e863bbae5bd4b0a415e82410aa0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11940 11220 bytes

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