Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9c2e5b9807492e…

MALICIOUS

PDF

81.0 KB Created: 2021-09-02 08:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1235101c6c00714e7bdd2bd45e96a2d0 SHA-1: b37aab0a7c12d8e2ecf0f323c8e6cd131fdb3d8f SHA-256: 8c9c2e5b9807492ee4ae2e635363dfe0976043351c9fbc0498feb81b4180f002
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains numerous links to websites that appear to be compromised, hosting PDF files. These links are likely used to redirect the user to malicious content, potentially for phishing or to download further malware. The PDF structure itself is also indicative of a link farm designed to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/69dcjbo6qsfhg08g0khta0all7/xozorabapuxajo.pdf
    • http://banghetretruc.com/media/ftp/file/xitutude.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833765169f---5389060619.pdf
    • http://benrassam.com/uploads/files/48660592470.pdf
    • https://alutat.com/data/file/fidege.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f194965a0---90034555294.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/af478708021a3fad97c335f098870b22/refevavitezibuj.pdf
    • https://securityguardsupply.org/php/uploads/file/rowijetavogevotebudes.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16093562e9d0e1---15395071374.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab12f78b338---36035374118.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16072408891009---befibabazo.pdf
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/cf154e470b63d461ba55539e51e6d248/35919922253.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90066af5d4---84857370075.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/9966851a5bd3e5220848dcb5e994a49e/32609795554.pdf
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/ponubewor.pdf
    • https://alakharia.com/public_html/userfiles/file/55791664257.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16076b5df486d9---kujolelowatuweriwe.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160903d9b4280c---78246465468.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108601013a4f---74176410954.pdf
    • http://thuocnam.xyz/images/files/mejezofe.pdf
    • http://stembridgefamilyreunion.com/clients/0/0d/0db03be1a97f3028174cafb645c8c91f/File/vujugupiro.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c28bc9f193c---87328281182.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/93768e002a9c986ae5e909fc4b8970d7/54647033730.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/dcotb8of4488mrdk58co61o5vd/kuzudoxofan.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/a247e7ed993fdeece9cd8761048cb2ec/desomanisabeji.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16081c7ee07f3c---36466930877.pdf
    • https://angelsforwarriors.org/userfiles/files/pisukaga.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=kings+arms+stowmarket
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db23.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB23 16792 bytes
font_01_sfnt_off0000f33a.bin
6a242047d9d88ffb631d45c92822993663efce5c427ee3cc5f13bf15e03c5cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 10572 bytes
font_02_sfnt_off00010b71.bin
41b1a1b3e45cbe6c339864b343930d81fc459ebc90bc153ae5c6b11f7b3efead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B71 16424 bytes

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