Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2b796fc62dfa72…

MALICIOUS

PDF

85.7 KB Created: 2021-08-29 05:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4bdb005a9a43179ad13296b2f61f61c5 SHA-1: 99df3e78e449410376bb201629eec378eeb5116e SHA-256: fd2b796fc62dfa72607d897954ff23eca6c03cc57be5f72f25acdd418979f574
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers also indicated maliciousness. It contains a link farm with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to host or distribute malicious content. The presence of these links and the overall structure indicate a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fidelishospice.com/ckfinder/userfiles/files/lepiwebugivurarete.pdf In PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0272af1d88---kipowudejojamo.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160735c7fc5404---zidimusojadibudupod.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff146a13a0---56510608994.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/81804973561.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/56518055026.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/84latg92125mhuoa6slplevvd6/73235583077.pdfIn PDF document text
    • http://one9five.com/userfiles/files/71780891832.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/juraki.pdfIn PDF document text
    • https://webmenuplus.com/images/file/25926154774.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/geledorotavujenopakok.pdfIn PDF document text
    • http://unseretochter.ch/images/file/67841456043.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/qanp05feamsug1ufio3c8dn0e7/90957587328.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/16814787033.pdfIn PDF document text
    • http://balbu.hu/uploads/news/file/99989079490.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/wimasovebos.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/tuwolozojukopuwiwenijevat.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/f18put36lklvts0pbu7s44se1a/nodubilukev.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/tizekixabokuk.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/92951d4284160ae0bb85c7e7783b568e/tefupete.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/moxifuwixotabefej.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce96db59883---65343734657.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/vemibosarasawudemilom.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/vavogajabukarurokesitele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cartomancy+card+combination+meaningsPDF 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_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 17936 bytes
SHA-256: 50b6d9b331f87a902921a8ffea8531fabd9b703f3012f77d9bc704b096a8e8d7
font_01_sfnt_off000115da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DA 10952 bytes
SHA-256: 3f810b937336232b47416f2da18e6aa5118eadaff22454750f2e515ed3a4cfd7
font_02_sfnt_off00012f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.