Malicious PDF — malware analysis report

Static analysis result for SHA-256 15236090c734ffec…

MALICIOUS

PDF

77.3 KB Created: 2021-07-20 14:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f42d135d958a65a9b754f9ca9bdb30cc SHA-1: ed6ab8bad615395ae8fa9dde03f8649b2c6cd22d SHA-256: 15236090c734ffec7468eeae4a60de781baea76a68bf0f6cfd5959b0231c5ff5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://sikanderajam.com/Robinson/ckfinder/userfiles/files/89628254268.pdf In PDF document text
    • http://mutitar.com/user_img/files/43902146758.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/pb3e2ngktpd0nc8na8o58j942p/87710535660.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/woninazufukemifovugufud.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5dbcd21fe---76394585288.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/43981798609.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/mixepokifu.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/65558084242.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/fokixunakuba.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/42275035503.pdfIn PDF document text
    • http://czapla-dachy.pl/public/images/fck/file/zitawuvodulo.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ii2180t1dq2fanp8heuoh4b8lr/9663471797.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/f9okmvopkm5a0r8f35hna15ip2/dubigemazub.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3327da27d---92505467805.pdfIn PDF document text
    • http://poetryforthespirit.com/clients/872464/File/jekajuri.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa76ff31d6d---1448302197.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/70715666300.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/15075074192.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/tkgg9f7e75mi9iss4qoaii49vv/fovufof.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3307b0c6ad---rugupixiposozitux.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd7c0220264---35355585803.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/busijimebox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=cyber+security+mcqs+with+answersPDF 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_off0000cb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 16576 bytes
SHA-256: c43ba53d17207826c9d17747ea1e6e9c767ef802325416695dc6106e1064eab6
font_02_sfnt_off00010ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC4 10948 bytes
SHA-256: 10ea308bdd9e0ab396f39a1fd1f4bf4dff0fe83533f6a6f13e61c55682084593

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