Malicious PDF — malware analysis report

Static analysis result for SHA-256 491394a64ade1954…

MALICIOUS

PDF

68.2 KB Created: 2021-03-13 22:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5b1577c23f9cec100f04e2600be5b586 SHA-1: 50b9faa0b84191ce6771ff73b530247a8de28420 SHA-256: 491394a64ade1954132b8de0892c14126b1643d13c0c22b879dda8b4ae83d282
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is also listed among many other URLs extracted from the document. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, contains text related to 'b cubed unblocked' and the authoring application, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=b+cubed+unblocked PDF link annotation
    • http://gakawisogafuga.mygamesonline.org/kowometiwos.pdfIn PDF document text
    • http://reduslim-sito.site/how_to_draw_portraits_with_charcoal_pencils5jl45.pdfIn PDF document text
    • https://xikisujegowo.weebly.com/uploads/1/3/1/8/131856166/1115346.pdfIn PDF document text
    • http://bezprovodov.guru/zafibadipunupokoxonanediy2j.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/finimibexin.pdfIn PDF document text
    • http://shop50off.info/157176484697g31v.pdfIn PDF document text
    • http://instapresent.site/mathematical_theory_of_communicationaf6oz.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/tazarojuko_kokasotubituz_xevareduketot_luwufasudi.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/jegigod.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/22151037283zxc2x.pdfIn PDF document text
    • http://tublitalia.fun/56555562703ct2w8.pdfIn PDF document text
    • http://cadenalia.com/asus_rt-n66u_admin_user55vca.pdfIn PDF document text
    • http://idealica-italiaoficial.site/90612672384241hb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dazewedoxagaxaz.epizy.com/40299772428.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/96474200275.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/92659226420.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/chronicle_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/xavetitajekulewisiv.pdfIn PDF document text
    • http://telimivakapot.epizy.com/un_autre_maroc_abdellatif_laabi.pdfIn PDF document text
    • http://gezixerigalejeb.rf.gd/44618608974.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/cg_dj_syk_all_song_2019.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_off0000d15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15C 4700 bytes
SHA-256: 6182066ca9e310f1a5c4d218c46c0ea70821616d7f4f95f1470d23a944776874
font_01_sfnt_off0000e16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 10048 bytes
SHA-256: 0685517c31516ab194da693f15ab7633eb75437105031d2af06acabfe3bdc604

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