Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e5ee836e0a7bef…

MALICIOUS

PDF

84.3 KB Created: 2021-09-04 04:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e8274b89d1ed97051074f894ecf3f62e SHA-1: bf8a1fa084a396c599bcdea90c17f6b317593654 SHA-256: c0e5ee836e0a7befae7db35c6f627bc59e93b4ba4582b5151f84f7a1c5ce1c3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cvconstructionsgoa.com/pharma/admin/userfiles/file/vivixijosedukilumegine.pdf In PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b77db906fb2---76208231291.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/bedirukobefile.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/sj7c66g7tm608umboi55277vkd/34199165967.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/visagukelamasidofu.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611d06eb6d6bc---20532067453.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/11027855082.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/kuturikojalowoxij.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/bab6692d81d704c1afc3e8e9ae31400d/seduxerek.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979a28d60d6---57626468696.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/fd3efac310b1b0dafad36e66d337bc09/winijutinexunejojevu.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/54228032361.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/55661836012.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/83856370066.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16074fbc61d442---bowigetisolisaj.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/95352914784.pdfIn PDF document text
    • https://thepainter.asia/upload/files/ninonipisibedinuta.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/nudur.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/3518de26b84ed1dc80eaf44d567c2c26/43925136221.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/nubodowodox.pdfIn PDF document text
    • https://lanjutpt1.com/contents//files/66405411405.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/49181656813.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/dudufuvapawugiferobisefel.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160761cfb6a9cd---kugazewafok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=que+es+analisis+y+descripcion+de+puestos+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE272 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA84 18636 bytes
SHA-256: 9dd3163fca83d1e8fcdd85eebf293c41b713dcceedc971441d5067177821b806
font_02_sfnt_off0001299b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299B 10888 bytes
SHA-256: 2aa3107fac43584ab92997a9eab2930d6a7a4bdb27e59d4c46ccf4852cbbe881

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