Malicious PDF — malware analysis report

Static analysis result for SHA-256 60300e7291c91501…

MALICIOUS

PDF

85.3 KB Created: 2021-09-15 19:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a1ab954a9d6ee32a94dfafb12259829 SHA-1: 487352963aab73b1f2d4796909f300078ec92c00 SHA-256: 60300e7291c91501db976044009fdc462b3348e7621a20a6df6df1e684161311
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to websites that appear to be part of a link farm or hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. The presence of external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://foto-recepty.sk/images/fotky/20068183484.pdf In PDF document text
    • http://tecnoservizi.com/userfiles/files/70314879754.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/99848474518.pdfIn PDF document text
    • https://securitydm.com/slicice/file/mejonobasusudujafimudu.pdfIn PDF document text
    • https://ventsistem-bg.com/userfiles/file/daxutuvafizuzosexe.pdfIn PDF document text
    • https://tempegaring.com/contents/files/65266099288.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/gukedonigodibidu.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/89753794940.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/funototawobuvosofamaj.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210913_103413.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-3/20210903183116166497.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210913012928.pdfIn PDF document text
    • https://people11people.com/uploads/File/71362549809.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/gidiniredagosigufatafa.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/joxopubogogovoboxalajevi.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109141335358527.pdfIn PDF document text
    • http://www.culturehousesun.org/photos/file/71323856624.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/joxuririfepewe.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rlos393rrohanca0tht0d7k87n/muganuworosez.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/devipitetip.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/tuvikatemoxowaboza.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/90893797194.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/sesigotobufajuloxujuwe.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/12425734598.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f207faa6ee---51406584344.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/161317e8991096---6068653733.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=online+free+psn+code+generatorPDF 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_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001014d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014D 10820 bytes
SHA-256: a3ea96955b4b1e56dc82a9a1a0224801dc4a43dc39e9751e8af14888a3389d6d
font_02_sfnt_off00011a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2D 17744 bytes
SHA-256: 7ae4c6c178b080794f08eaeacbc5168273e68b47910212423a25bcb4fa1b7b92