Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4938a738685c5a…

MALICIOUS

PDF

79.8 KB Created: 2021-05-25 14:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61e73ba9e3db91f7e601bd9a784e46cb SHA-1: 9baff9c2ce465023891eb5aeb7c4749775424b5e SHA-256: ec4938a738685c5ab8262cd2f005db3d4e4511a86bb0bb690847f4807256516d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site disguised as charging instructions for Jlab JBuds Air. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware delivery. No scripts were extracted, but the presence of a malicious URL within the document body is a primary indicator of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=jlab+jbuds+air+charging+instructions
    • https://cdn-cms.f-static.net/uploads/4369138/normal_603ff7314202d.pdf
    • https://cdn-cms.f-static.net/uploads/4485457/normal_5fe7038eea663.pdf
    • https://static.s123-cdn-static.com/uploads/4382430/normal_5fe23e9004bff.pdf
    • https://cdn-cms.f-static.net/uploads/4456667/normal_606330fd0791a.pdf
    • https://cdn-cms.f-static.net/uploads/4405660/normal_6065dee8ba434.pdf
    • https://static.s123-cdn-static.com/uploads/4490380/normal_5ffdc65b267f7.pdf
    • https://cdn-cms.f-static.net/uploads/4448985/normal_602f3d8ba3d4d.pdf
    • https://cdn-cms.f-static.net/uploads/4418783/normal_606adbd6d25e7.pdf
    • https://cdn-cms.f-static.net/uploads/4379959/normal_604d4de162f5e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jiwisigetizoxif/wagugewupilowibaguzaj.pdf
    • https://s3.amazonaws.com/suzixegazunow/another_me_2014_full_movie.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/lawuwiguluxunufalubarabof.pdf
    • https://s3.amazonaws.com/rejiner/ligirabopo.pdf
    • https://s3.amazonaws.com/ganubifirigevi/ds212_oscilloscope_manual.pdf
    • https://s3.amazonaws.com/sitozi/fortnite_gotham_challenges_cheat_sheet.pdf
    • https://s3.amazonaws.com/dowesitobuga/what_are_the_7_principles_of_art_and_their_definitions.pdf
    • https://s3.amazonaws.com/rakabexozu/tupaxizuduroten.pdf
    • https://s3.amazonaws.com/jazuravazaguz/nofubelanopemenuditela.pdf
    • https://s3.amazonaws.com/pujirageg/jorge_luis_borges_quotes_in_spanish.pdf
    • https://s3.amazonaws.com/sakaburepagase/positive_psychology_online_course_harvard.pdf
    • https://s3.amazonaws.com/rodakarugupoko/cv_template_marketing_manager.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/foundations_of_wesleyan-_arminian_theology.pdf
    • https://s3.amazonaws.com/vavabi/medical_answering_services_mileage_reimbursement.pdf
    • https://s3.amazonaws.com/rovuweraja/vabidaloro.pdf
    • https://s3.amazonaws.com/bisegilupuf/87517358548.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_off0000f455.bin
88e032ebebda13b7fe70686ac77c022cb3df882ea544548760123d34ad29b2f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 5408 bytes
font_01_sfnt_off000106b1.bin
a97ee5c40dcfc50b6fd495b2742d9e9b40487b17cdf3cc40a4f314f5cec4a07a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B1 12968 bytes

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