Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad13295b2a7677b…

MALICIOUS

PDF

72.2 KB Created: 2021-05-20 03:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 18e37a34abe2c9f2498ec5c0ed9f6982 SHA-1: 5b8d1e7760f19d9a8bf93aac047a7a846bca895a SHA-256: 6ad13295b2a7677b92ba040bbaecb938029197ccdbee86a1cc3379f571e2078d
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://kuzutuzo.ru/strik?utm_term=expresate+%25D0%25B8%25D1%2581%25D0%25BF%25D0%25B0%25D0%25BD%25D1%2581%25D0%25BA%25D0%25B8%25D0%25B9+1+%25D1%2583%25D1%2587%25D0%25B5%25D0%25B1%25D0%25BD%25D0%25B8%25D0%25BA%25D0%25B0 PDF link annotation
    • https://bigeriburaline.weebly.com/uploads/1/3/4/3/134334921/zinulewukiwir.pdfIn PDF document text
    • https://relotevifinedu.weebly.com/uploads/1/3/2/6/132683264/zuvem.pdfIn PDF document text
    • https://bapumuper.weebly.com/uploads/1/3/1/1/131164114/balefojusodido-ganodatinudedi-zikaxeguwo.pdfIn PDF document text
    • https://kinijenu.weebly.com/uploads/1/3/4/6/134641264/sisarekujadegefizeb.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/80604974ba.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/1b0dd99b4e3ec21.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/31f75d7.pdfIn PDF document text
    • https://jodutofafedabaf.weebly.com/uploads/1/3/1/4/131452959/bosolipefukasaf.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/zijowew_muvovisavil_volavotorilavu_xupexomexa.pdfIn PDF document text
    • https://piwitaxoz.weebly.com/uploads/1/3/4/6/134603619/pasosegasulerok.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/879ef5d.pdfIn PDF document text
    • https://zofazozudu.weebly.com/uploads/1/3/0/7/130739697/bivozolubev_maluwupimin_zixaz_zapudaxap.pdfIn PDF document text
    • https://duvujisukodat.weebly.com/uploads/1/3/4/6/134674851/sakojodi.pdfIn PDF document text
    • https://milisaso.weebly.com/uploads/1/3/4/6/134666171/bb0d9b3.pdfIn PDF document text
    • https://makaxifosezopuv.weebly.com/uploads/1/3/4/5/134511124/cb680031f941.pdfIn PDF document text
    • https://nurosamemozixa.weebly.com/uploads/1/3/4/3/134375837/3997610.pdfIn PDF document text
    • https://kosemopadil.weebly.com/uploads/1/3/4/6/134669244/b33f762afbf50ef.pdfIn PDF document text
    • https://zuvigopujipo.weebly.com/uploads/1/3/0/9/130969218/7b181bce62.pdfIn PDF document text
    • https://nibuwoxemunovox.weebly.com/uploads/1/3/4/7/134714338/79423749c12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fazujo/kawogixaw.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/fuzatiwadu.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/dedaxedagevepipalagufas.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/mofukewomos.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/fidaba.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/resumen_del_principe_de_maquiavelo.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/39466084530.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/suwatavifogamewarutowezu.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/aadhar_card_in_telugu.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_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 5576 bytes
SHA-256: f0cb1d5fa1cacdd5bc79585464aa6b858e30036da28a34bef27de6e25ef4f29f
font_01_sfnt_off0000e2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 9728 bytes
SHA-256: 8451a09d059e8866ebda0632a699f43019254b30286afc878382dcaa2ccd7109
font_02_sfnt_off0001040d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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