Malicious PDF — malware analysis report

Static analysis result for SHA-256 394ff1d944543382…

MALICIOUS

PDF

79.4 KB Created: 2021-02-08 08:05:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a229ae8c6f5da752f021d935e2a9586e SHA-1: bf0953d8abba9726a34f068ca3016d342f586e9f SHA-256: 394ff1d9445433823a3db4f07f39b99c9f2859ae3dc5000fb55a735db26bfe2d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely to deliver a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, appears to be a lure related to medical information.

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://jacksth.ru/wb?keyword=alzheimer PDF link annotation
    • http://iceteas.space/vozuvnblpu.pdfIn PDF document text
    • https://cdn.sqhk.co/kefesizo/DjgtgJb/person_shot_with_rip_ammo.pdfIn PDF document text
    • http://leftoutclub.com/wefudogakujolerixolunoixnrv.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/jdjgd7n/nofatinowuberaziwifurus.pdfIn PDF document text
    • http://bluebadge-support.com/cphims_review_guide_3rd_edition9trz3.pdfIn PDF document text
    • http://pasendapp.online/fubekof1utyg.pdfIn PDF document text
    • http://frukt.space/fast_and_furious_7_720p_dualbp72j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425913/normal_5ffd4c6597a34.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/f1hajji/bunny_s_world_jungle_bunny_run_2.pdfIn PDF document text
    • http://bodegumuxizobi.22web.org/t_reporter_c_ngha_l_g.pdfIn PDF document text
    • http://itasda.online/1249932143431eu4.pdfIn PDF document text
    • http://giveaway2020.info/23074149157el6vc.pdfIn PDF document text
    • http://cancandance.org/brainsonly_newsday_crosswordmofbw.pdfIn PDF document text
    • http://domainlimax.xyz/batman_1989_4kyhlra.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bamoxogoxufoge.epizy.com/47342098568.pdfIn PDF document text
    • http://relumewamamit.rf.gd/core_java_quiz_questions_and_answers.pdfIn PDF document text
    • http://zetakid.rf.gd/hard_long_division_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 5832 bytes
SHA-256: 0f79f7c99b656e5ac571a22754b320a9997d86ff9f2becc793ddf3ae032ec9cf
font_01_sfnt_off00010bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD2 10548 bytes
SHA-256: 5c9bc4ec2ccc19bfd0b4df373a4f1f355a62d06dd5867b8b55b9a78a97e5c885

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