Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17793786447500a…

MALICIOUS

PDF

81.6 KB Created: 2021-08-08 20:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f7a0f9f570194cf30e41c35e263f573e SHA-1: fb6b73f25f7a37335753070f4dec6a06caba92db SHA-256: b17793786447500acb172eb7f517907065df75c4061468db9adc3842c05f53dc
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It functions as a link farm, presenting numerous URLs that point to external resources, some hosted on compromised WordPress sites. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=electronic+circuit+analysis+question+bank PDF link annotation
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/84b2ac999a5e9a4ea0f4dfcfa2a7f34b/fodorow.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/mukubulejivikopurew.pdfIn PDF document text
    • https://i3mit.com/shopadmin/upload/files/94363914768.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/fovutem.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/disifebametaj.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/4299977847.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/mojasuwaxijofazubif.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/76es6q7ep80os4ck3t2a63bbfh/33079124256.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/tevunapibeva.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b2f16bf502ae1d5cb8d0f3fadda39466/65102748991.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608751dc77c8e---madefabavizepadibovutugab.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e687da9fef0---89915909844.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/427779fcbc542a6e0a9d2e71c826a5f9/80040165282.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/xoxefoxusosubus.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/saxif.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/20as2uv2u1cvognjiroma7k2v6/92830336740.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/84c25ed01e3371a0c390ef816d708dfa/18603171968.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/podetefijaxifitilavakazun.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fe52d5f75---zarulezatujubemezewekixi.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/8627011075.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/f90kf2ctdfh3af9tso3h8ucj5f/mevizotefelexiwijodi.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eccbeb58c5---70356983727.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/e5b85e070862b50e0146ff92c4223298/jiwokidonotajipasulik.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_off0000d83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83F 16900 bytes
SHA-256: 8a36c5845a20ae3baf7b7c46c5ea21f7b2e30be96b334d1788d2741fe195815f
font_01_sfnt_off00010455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10455 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6C 10800 bytes
SHA-256: 92cdc3cfdea786295810af0c761608c347fd0f7e9ad0bf3efbc4b744ebcdb992

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