Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ed6d668ac6f517…

MALICIOUS

PDF

89.3 KB Created: 2021-07-02 01:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 653c89e7ef48f2d3edba8d494710f91d SHA-1: cdf41fee6a14c443529673fa3d222390d3e703d5 SHA-256: d5ed6d668ac6f517a9b42608c403067e0b9fd7e807fb4c9f5c801da23075cf06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=free+insta+comments PDF link annotation
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5e823c161---15692545163.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/xogurimexojojolulepul.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/xejufegopazofigup.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/95640587690.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfeb0e1e295---29324761203.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/hcotoe9ib5eqp58d9ae8pvrnce/jipomapax.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/2cb4a5a2b82e02c3902db58804ac62a7/41044230375.pdfIn PDF document text
    • https://emmaushuis.org/pages/lomuvogolewoja.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/72065979443.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160971b564233c---10122012194.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16090a4bd7a76e---kajolepezebuzun.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/a036140dfe1b97d3c0a5ba062c8751bb/gesajiguvijutimarowaloge.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/jkkh2qkmoklfqsnfobj6e8cg5q/98349517254.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/pituvazojexadetiko.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbe86ad17b---wopaludetusa.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/37908611301.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c780661f18---26630446879.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dafbcebd03---gexipizemeka.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210617054109545433g8gm1.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c24a889618c---5786548110.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/pvbh2o394gcvqe3jkullsug7e1/nagume.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23127199c8---40826606216.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608062e155230---22450117682.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/9l8ard9vvai8729jq3mle3tb69/repolavelulapiku.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/5f7c2f2c4bd688fafdcb76e1b579bc55/dofixamazafagot.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://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_off0000fa84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 10320 bytes
SHA-256: ad9c3b180da4ce77e9c1ca05ae5acdc5cec439d059b718b56384e855095a92d1
font_02_sfnt_off000129dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DD 17280 bytes
SHA-256: a2c2ba2b48a5853e00e8d28993f76bc92709711ba9fbfc851211de588e572942