Malicious PDF — malware analysis report

Static analysis result for SHA-256 0060b0d647c23aa7…

MALICIOUS

PDF

83.9 KB Created: 2021-09-09 14:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8fa4f9e65e711e3a7c90140ecf8eba45 SHA-1: c74e16fdd8c9f22dcec89d74407a8285ccb675e2 SHA-256: 0060b0d647c23aa7b08acbbf575a9cb447753cad1c1ee76f2b46730a1672a64c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to potentially compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/rigoduvupijok.pdf In PDF document text
    • http://fullerton.kopanramen.com/uploads/files/26571240662.pdfIn PDF document text
    • https://salwangurugram.com/files/42631413437.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/79329784031.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109080425288532.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210909013509.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613849865994e---jugejawenawupafiwapum.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/75995591244.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/rupukadefosoliwata.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/30511958604.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109021104253734.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/fusagek.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161365cdd46a92---75154192972.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/35837691594.pdfIn PDF document text
    • http://8njl.com/userfiles/files/rawadomezobadapanonapu.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/830507492.pdfIn PDF document text
    • https://kaimano.it/file/vevutizorikidopokajiruf.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kotet.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/mamugifenometoda.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613264e497284---97189101624.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/42153428252.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/pumotafiguxeza.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/57711467843.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/54766364471.pdfIn PDF document text
    • http://gibisch.biz/files/files/gunevadex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=fortnite+free+v+bucks+creative+codePDF 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_off0000e237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 10800 bytes
SHA-256: 942add7b8bee6300c46901b1cc666b942745c39d7578d15ca16f4bad8ed29f9c
font_01_sfnt_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 17832 bytes
SHA-256: 2f6cea8fd312ad1eabb6cc75b6e731141c44629d4d320bd9cabc0794e6a940e4
font_02_sfnt_off000129dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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