Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e1b832be748851…

MALICIOUS

PDF

85.3 KB Created: 2021-03-18 02:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 62d521aab4430e31670341d3a78eebe9 SHA-1: ddcdcc6d46e2de1c6ceaef4db309187c55b1e7a2 SHA-256: 65e1b832be748851fa1a5aeb2fc7cfbfa5299c013c9846a74e434d80e446bad8
156 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, a common tactic for link farms or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs, particularly the one leading to 'jumiwimov.ru', suggests an attempt to redirect the user to a malicious site, likely for malware distribution or phishing, disguised as a tutorial.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://jumiwimov.ru/strik?utm_term=autocad+electrical+tutorial+ppt PDF link annotation
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/memabe.pdfIn PDF document text
    • http://esplus.pro/text_png_logopjp2w.pdfIn PDF document text
    • https://nagalijas.weebly.com/uploads/1/3/1/3/131398542/lowipubu-lizaja.pdfIn PDF document text
    • https://sapakuso.weebly.com/uploads/1/3/5/2/135297556/730c5a.pdfIn PDF document text
    • https://felonuwonab.weebly.com/uploads/1/3/0/8/130814100/piduboremusozukates.pdfIn PDF document text
    • http://alphabitx.com/wuxidiqptnk.pdfIn PDF document text
    • https://poxefapujo.weebly.com/uploads/1/3/5/3/135312596/3212939.pdfIn PDF document text
    • http://porn77.design/9359319690ayqnw.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mogipegi/12406336397.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/nc_dmv_test_questions_and_answers_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/alestorm_keelhauled_sheet_music.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_9b80db3da0b849888cea095b70517ecd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/zejefovotedevukik.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/deer_hunters_moon_guide_2019.pdfIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_17b1fbb97b304d5a88676c29de50e874.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_4f270adae2bf4e9e8a3999db8017fc4e.pdf?index=trueIn PDF document text
    • http://wedepije.epizy.com/livasopug.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_c9f6ef01ad5e4b87877342ed0efdc2f0.pdf?index=trueIn PDF document text
    • http://golokelu.rf.gd/86684130905.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/2018_yearly_calendar_template_excel_australia.pdfIn PDF document text
    • http://rilevoka.rf.gd/owners_manual_for_cars.pdfIn PDF document text
    • http://luvibiw.epizy.com/pasumivevenesugetebixebel.pdfIn PDF document text
    • http://xafegewoweli.epizy.com/30173553945.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/nevumiwidesepapuwokawaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/68906755768.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10114 3268 bytes
SHA-256: e010568bea3a862f8235e91f40eda2b4a1d65b423864eed79f45969d952e7e02
font_01_sfnt_off00010e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1D 4880 bytes
SHA-256: 604e64c432956032af39f8300a45fd073b9c7dbf7df41fcbc380c6190c4c1f1c
font_02_sfnt_off00011ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBE 11328 bytes
SHA-256: a6d65bd67a438ac7d96b4afcaa2a08a96b631123f17d4ef355e680d92490d88e

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