Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8a39976a24dd1b…

MALICIOUS

PDF

77.0 KB Created: 2021-06-09 04:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e42601a6e096f2a434689a23c897f779 SHA-1: 567676f08bc782f023f0ecaa8c6f543cc416441f SHA-256: 9c8a39976a24dd1be0147d267e68729d58ac44306d6680c2f2afed652f7f7563
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, presenting multiple URLs that appear to offer downloads for game files, likely as a lure. The presence of numerous links hosted on compromised WordPress sites suggests an attempt to distribute malware or phishing content through deceptive download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://infrive.ru/uplcv?utm_term=download+efootball+pes+2021+ppsspp+iso+file PDF link annotation
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b1c0315e0---kosevuxebigerofemobofipo.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/d2c2f9ad39e9a01b108251b3d7b9265e/51667952355.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd4966df79---42453831361.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/gqo9th72424086ags85ksah3q1/burutupuji.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/hhveupllodb59a7av5onkodqb3/47899213413.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b521c517a0c---10180118729.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080a8b690ba9---rijejofenajuxoxeji.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/lorudi.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16099366d052af---riripezugafapeli.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/46916925626.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2291d47e2a---tukulu.pdfIn PDF document text
    • http://tfforming.ru/d/files/pejosudumoxuzefa.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/j3po2v2a6u1hqbff7kc6d3tf43/fizedipugenimepoxete.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/loreparubofetizumesep.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/448d195cd0b95db495a75be850393fd5/99980906266.pdfIn PDF document text
    • http://vinmexindia.com/uploads/zuvif.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/vo1jgi83ha7ig2m5l41vnv8ltk/volena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 5496 bytes
SHA-256: ce3243997c49d7d51ccdb86cde33fbecbfe9def6fa925c04e4123428e8c8ca08
font_01_sfnt_off0000ffee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEE 10976 bytes
SHA-256: 59a6f525421e6801e2ddca4b61ea0ce74b0def8890a0a69b4dbc2196b80a7fbd