Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c13d44f2f64af2…

MALICIOUS

PDF

72.5 KB Created: 2021-09-07 22:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2720f07fff747a6060dbc118b206c4e2 SHA-1: 100423988097c6a8c9e5a670922557a8dd59a2ba SHA-256: a9c13d44f2f64af2dff2bbce4bab8092b2b91badd5cf4f264c4bfe3150aacf0c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded URLs indicate it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=up+police+sub-inspector+syllabus+2017+download+pdf PDF link annotation
    • https://mimpishio1.com/contents/files/83635629806.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/68e1a556869ebfe8139f40a31db133ec/jugukukevetigemed.pdfIn PDF document text
    • https://shidoremicrosys.com/media/fizizewofobitudisafubu.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/potusobirakakuzogelewe.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/77197151945.pdfIn PDF document text
    • http://getdol.com/page_data/file/gadawatofogibuwasipebujos.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/tuwarogofuziratemenen.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607501e64b295---lalifiw.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c7358fefed1---dosilezuminewijopanajewet.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/73220624991.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/4fce9d4c48f1b66cd32571ad4bbd235f/48581580174.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/vudafubaf.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/nedojiben.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/91302614764.pdfIn PDF document text
    • https://termofriz.rs//files/4090639526.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/gem4k2sv8uqr4miutfj1ipu1qd/jiwenazowires.pdfIn PDF document text
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/siwijipugan.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/dugapimifu.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/sokajejimuxojakebali.pdfIn PDF document text
    • https://isleo.com/i_photos/file/11929106102.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f0abe074060---ruloles.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2e33460d8---favasepuwenokiju.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/8946927397.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/47281406527.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_off0000b756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB756 11436 bytes
SHA-256: fb7d84bb878bcc04c41287443587d7e7440854bfe7d20a6e5a211d4be2b0068d
font_01_sfnt_off0000d281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD281 16016 bytes
SHA-256: f33b76df5b0ec7d77c00db243d330d26087e6dd18b25f7ab062670d0f027e830
font_02_sfnt_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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