Malicious PDF — malware analysis report

Static analysis result for SHA-256 1610cebe8eeb4013…

MALICIOUS

PDF

77.3 KB Created: 2021-04-07 16:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8a46a4cbf3e079b274b0f19e5e69a824 SHA-1: 6a60c7c4288cad9240b3727316e765723e276e1e SHA-256: 1610cebe8eeb4013d41e9c4ff944f79948dec8d27be130ca9c5b39e32b73b7b8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary focus on directing users to 'xezojetit.ru'. This URL is likely part of a link farm designed to attract traffic or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=how+to+write+a+plot+for+a+short+story PDF link annotation
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/tojazetadozusexipe.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/vabowafa.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/jolinilixomulapovaxiwer.pdfIn PDF document text
    • http://goxamid.mypressonline.com/41468154361.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/39525718763.pdfIn PDF document text
    • https://xowuwipasek.weebly.com/uploads/1/3/4/3/134310121/kaxedakatitugu.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/xijilesuzuxo/43531776432.pdfIn PDF document text
    • https://93641f3c-03d3-4c8c-b6db-0fd9bfabe798.filesusr.com/ugd/384ca7_e6dc65a0b140449c9c3082a05667a5a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/brush_png_zip.pdfIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_b5e4e34157d041aa817a8f502e875333.pdf?index=trueIn PDF document text
    • http://sebokegekesuded.atwebpages.com/25597988602.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/yamaha_g1_electric_golf_cart_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/dazalepivitutititenepix.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/72519613873.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/kemokedajopajaxuzopudala.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/keurig_k_cups_hot_chocolate_sugar_free.pdfIn PDF document text
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_b6e57e78a3404a1f8b735f063a57dea9.pdf?index=trueIn PDF document text
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_a1fad7ad93e842a991ba09fa3e9bee3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wusone/nursing_ethical_dilemma_informed_consent.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/97337407670.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_58fc85cc313541b19d68a10ae2f4eed4.pdf?index=trueIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/38774727182.pdfIn PDF document text
    • http://voturugivorajop.onlinewebshop.net/jspdf_autotable_font_family.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/corsair_k95_keycap_set.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_off0000f0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AF 5144 bytes
SHA-256: 1b302e1955d594ba0bc44d7a3ab67bfb14030bb85bbb1902f08e121e7913507b
font_01_sfnt_off00010241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10241 10936 bytes
SHA-256: 65fe7472d243c6eba0080491db658ea0e983c1a78dbdef974233abf436a1057d

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