Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffdea4be2d0205b…

MALICIOUS

PDF

76.4 KB Created: 2021-03-13 18:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4b8149dd676581f56a13b4eb595aa790 SHA-1: 7dc659650021ed317f957768f6689defd809b50b SHA-256: 0ffdea4be2d0205bd157098ffb6f4827db327b4968da188de6652f33dfe27a3b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, appears to reference 'Bharathiar university pg syllabus pdf', suggesting a lure to trick users into downloading potentially malicious content. No scripts were extracted, but the presence of external URIs and the high risk score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/123?utm_term=bharathiar+university+pg+syllabus+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481155/normal_5fc9a02355562.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/wzifTjc/professional_cake_decorating_courses_near_me.pdfIn PDF document text
    • http://podarokinsta24.online/is_there_a_money_glitch_in_gta_5_onlinetjngf.pdfIn PDF document text
    • https://riwozetamozu.weebly.com/uploads/1/3/4/3/134331456/a4bf91498a6.pdfIn PDF document text
    • http://resimpub.com/nasawo7rek5.pdfIn PDF document text
    • https://kidodizaramaba.weebly.com/uploads/1/3/4/0/134096495/129cfbc64a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479212/normal_5fdfc86c418ce.pdfIn PDF document text
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/nebusulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_60218547588db.pdfIn PDF document text
    • https://cdn.sqhk.co/bumegukomuza/uiiidgf/20618683793.pdfIn PDF document text
    • http://nubenukarerira.22web.org/the_ugly_american_sparknotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_603122a6a3d9f.pdfIn PDF document text
    • https://cdn.sqhk.co/fobevufesupi/CidgAhb/tik_tok_video_play_store.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/2590972.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/69597449522qx3d7.pdfIn PDF document text
    • https://tipurovus.weebly.com/uploads/1/3/2/7/132741110/8cb7d6870622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_602d1df81452c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/lg_hbs_750_bluetooth_headset.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/berlitz_essential_spanish.pdfIn PDF document text
    • http://jibefemojus.epizy.com/chauvet_slimpar_56_color_chart.pdfIn PDF document text
    • http://zipazakixodi.rf.gd/kikupekinovewuvetolakak.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/93078363888.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/dokigodimetejad.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/bird_of_paradise_care_sheet.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_off0000ec3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3C 5656 bytes
SHA-256: 0fac50f64d4e33f0fe5e799ba43480d7162e1406052b5ebc56f00d9b6a3ac435
font_01_sfnt_off0000ff84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 10684 bytes
SHA-256: 6434d0b54ed29bd9e678c0c46efa5ad4ed766f9eaac910fd4c549850f0167cdb

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