Malicious PDF — malware analysis report

Static analysis result for SHA-256 a568d4815840b0cc…

MALICIOUS

PDF

85.0 KB Created: 2021-05-09 03:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e56b69ba5672f1bd6456863bc37b963b SHA-1: fe910166ca716c0feba1770b83be5d3092d8eea5 SHA-256: a568d4815840b0cc714a30e8906ecede3eaf69f99db89a19b0f74b288f3f6d39
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious and detected as a phishing trojan by ClamAV. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, appears to be a lure related to a merit list, aiming to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://coretry.ru/uplcv?utm_term=ap+grama+sachivalayam+2nd+merit+list+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834bb7e4145---zupiwibavuwutuve.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079c0e280c9d---41412224141.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/l3euov6f2e45tknglqva4mfdqi/basunojowisuwosap.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/l484e8nuvq2fu8pvi4idio93m5/87997790827.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/46087896580.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/7d6ce0b9af0d58d4f67e55837506e5c2/towilukenixagowakoxoneke.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/12d26755f52b091c1aa3205089fda552/14314940357.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093f623b82c2---87890672506.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ee4a10ecfd674089a8f1feded0066227/30290510683.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/suvesunemisamugud.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073dee2ed220---nixijuku.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160807361cc32e---begixafebufudome.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/dab17e862b98d9c656edcf69b0c4a197/nagowekotake.pdfIn PDF document text
    • http://charivne.info/images/file/vanuzomaxelidimil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B9 5528 bytes
SHA-256: 14ecbcb10a87110f0f69c16a8bebd5de154d54916f3b193d1f1a3f6cbf314cd3
font_01_sfnt_off0000e563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE563 18372 bytes
SHA-256: 3d6afa52505e8914f980901a2f4b0a20cd586974c755fb704db13085d2f04e35
font_02_sfnt_off00011378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11378 10872 bytes
SHA-256: 61d4b9af53a16e1909f0f7efb6027ac5d12d3e9b36f306c31c6260696ef38031
font_03_sfnt_off0001389b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34