Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbbdc9f7241c0be…

MALICIOUS

PDF

75.6 KB Created: 2021-02-23 01:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 568d150d91baf456aabb410c31a96791 SHA-1: f2a671bf3489d5d9a8626db73ef47a5d4b7e8fe7 SHA-256: bfbbdc9f7241c0be913215033104b646a6fb6bccaa6ca0c26b485eb9b4f89bef
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to direct users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=how+to+make+2000+calories+a+day PDF link annotation
    • http://salearea.pro/recarga_certa_vivo_app46vyg.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/icijo9F/seesaw_ball_2018.pdfIn PDF document text
    • https://geguwuwivoloko.weebly.com/uploads/1/3/1/6/131636947/9907264.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420776/normal_60006bbb735ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5feb79e97f094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_60319347eecd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495686/normal_5fcb056e4118d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464863/normal_5ff81c6fc14e8.pdfIn PDF document text
    • https://navenote.weebly.com/uploads/1/3/5/3/135314710/8098001.pdfIn PDF document text
    • https://molilavavabofu.weebly.com/uploads/1/3/5/9/135989114/626638.pdfIn PDF document text
    • http://italywow.info/middle_school_english_worksheets62w02.pdfIn PDF document text
    • https://vekewofamir.weebly.com/uploads/1/3/4/1/134131384/5107606.pdfIn PDF document text
    • http://prolac.ru/fogeluyx667.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/8gg9jfR/two_guns_movie_review.pdfIn PDF document text
    • http://liketsven.xyz/39868637961mxd2g.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/jokotaziweluge/caxton_associates_performance_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/tonevotusidalofotofolusot.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/poretixo.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/amagama_okuhlabelela_hymn_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/ample_guitar_vst_crack.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_off0000e7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F7 5580 bytes
SHA-256: ef781dec7b2530ca190f9bb02b8c5985828b101ad49a29da235fbe784e0531d0
font_01_sfnt_off0000faec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 11252 bytes
SHA-256: 462375e261506265fc47cebef63423be70312773a3fae2c75f391fd7d9a04ccc

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