Malicious PDF — malware analysis report

Static analysis result for SHA-256 1880482695f0bcc5…

MALICIOUS

PDF

81.5 KB Created: 2021-09-05 22:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4a441d7fe1fd16d2b2347952b6c98690 SHA-1: 762d7866db65eb210f277f88bab7c530dfd1eee8 SHA-256: 1880482695f0bcc5e6182fa9d0995d3231955a948343717f318039aa088fb347
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. The document contains numerous external URIs and is structured as a link farm, with many links pointing to compromised WordPress upload storage and disposable hosting. The primary attack pattern involves directing users to malicious websites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=medical+medium+pdf+anthony+william PDF link annotation
    • https://gyn-koe70.de/obrazky/file/81948146447.pdfIn PDF document text
    • http://mastervin.ru/files/file/xafadazit.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607312f8f39a5---15585086730.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/lopiraxejeredutuwel.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/98658479007.pdfIn PDF document text
    • https://motecx.com/images/file/62896155966.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/todoriseseletit.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/3989ff5afd2ea283731e473d627e97fd/runafa.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/69ef05901e942eb231cf3da71141ef96/1383880360.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/1464651991.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/sulisuxafadikan.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/69610173661.pdfIn PDF document text
    • http://fairview68.org/clients/c/ca/ca24e3df3ff7fa9b839de6c08aba9959/File/getepomi.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/76ec3f446920c2b5551f518db73edd31/28738815130.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608689bb19bd7---25880606222.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202107140342387515.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/veseliwupoxitajudisofif.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/5cb2d7c5a2f81c60b8682647c1ff2341/40166880066.pdfIn PDF document text
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/98161014334.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/92864634637.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a3401f45fd1---nabukezujufexapi.pdfIn PDF document text
    • https://preciseenergygroup.com/media/27301153355.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/marev.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 10908 bytes
SHA-256: 6f2cb942d99aa84547e109cec8994aefabc18735a8982adff892d9b1f4994841
font_01_sfnt_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 16940 bytes
SHA-256: f79f76b9976cc111d39f5f5f2e8feca98f44f2de68fc0a8dbdd3169bb8b8aec3
font_02_sfnt_off0001202a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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