Malicious PDF — malware analysis report

Static analysis result for SHA-256 397b84c519434df1…

MALICIOUS

PDF

72.1 KB Created: 2021-02-24 17:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7939da418147518e5d40fd1db493be8a SHA-1: 2ba587431cbca693daf2b845b297f80d90a09987 SHA-256: 397b84c519434df11473683714e5061c4cebb3f395ef7330def1088073222969
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 URI pointing to a suspicious domain, identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to poetry analysis. The presence of multiple external URLs indicates a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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://seumenha.ru/strik?utm_term=how+to+know+the+stanza+of+a+poem PDF link annotation
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/nomizujeralowonududa.pdfIn PDF document text
    • http://x-bionic.shop/how_often_should_you_replace_wahl_bladesi2zoi.pdfIn PDF document text
    • http://trujillostacoshop.com/kpss_ders_videolar_indir_cretsiz_2019o7nve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422392/normal_5fc7c8065ad37.pdfIn PDF document text
    • http://contact-git.top/the_nature_of_code_p5.jsmmvlm.pdfIn PDF document text
    • http://fbcopyright-center.com/80399596085o6kxc.pdfIn PDF document text
    • http://nicepics.xyz/28447249320lhan6.pdfIn PDF document text
    • http://redtea.space/the_bristol_guide_handbook_for_education_professionals40565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416664/normal_5fef10b9ce293.pdfIn PDF document text
    • http://wownatural.fun/57788643152vo4vf.pdfIn PDF document text
    • http://teleporttur.ru/sefubisavav36js2.pdfIn PDF document text
    • http://telgrm.site/restas_con_llevadas_3_primariaa701l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491688/normal_60216eb6660cd.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/ropuba/xefefe.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/kiwax.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/dryer_sheets_and_cats.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/gutifetogakezo.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_off0000dd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD60 5180 bytes
SHA-256: 17dcb75a07ca6448245609919d818ff2a748009c18792b92376e7dd8b2533762
font_01_sfnt_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 10852 bytes
SHA-256: 84754393a09404fb3d6c6aa361daebc4b4a8dca033cc5cc88553909f4561f1c1