Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fdef50296a467d…

MALICIOUS

PDF

75.4 KB Created: 2021-09-16 21:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3578a9ebe3d18805bb98d5121069836a SHA-1: 4390f6864db5ba883dd0f3884e040f8f114e74a5 SHA-256: 69fdef50296a467d2b23ae2fd6389325e3b8edcf0654b84229e27d8738885147
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to a link farm, suggesting an attempt to redirect users to malicious sites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically identifies the document as a link farm on disposable hosting, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://turnwealthy.com/ckfinder/userfiles/files/53779423991.pdf In PDF document text
    • https://kolkatanagariksammelan.org/ckfinder/userfiles/files/rigakosinaloxavijex.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/lasimigozijaw.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/9901182456.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/68932701535.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/45079931794.pdfIn PDF document text
    • https://hirurgija.me/files/47801459260.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4dfdbaed8beafd783283d672b4a0f5aa/zafidapuvubar.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/49934521230.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/nefisizawa.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/bawip.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/bowipufidoso.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/34104085886.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/vofawubometedozufitiwa.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/46159866170.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/xibogedol.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/34329334680.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/lutuz.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/757883793.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/70181718437.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8efb8002c---44702904479.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/44552754006.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/mepup.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/xugulobemegeni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=one+piece+manga+pdf+volume+1PDF 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_off0000c2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BB 10840 bytes
SHA-256: 3685c5e52602f54171f70389d1f063f47f567d4f09ce88e17b49359f3545db04
font_01_sfnt_off0000db98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AA 17324 bytes
SHA-256: 7b598b7d0f1c85a36900f575b7a9c5a34eb875942ede9fd05930dfc1d0f31859

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