Malicious PDF — malware analysis report

Static analysis result for SHA-256 86cea40ab02ff437…

MALICIOUS

PDF

79.3 KB Created: 2021-09-08 00:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ad0425d429be199cae0b50c9acfc2982 SHA-1: afb3ce97ce9b0d1a378b71e941e9ad42a86ecaf4 SHA-256: 86cea40ab02ff43722ea6340440b8cb1cd4470b9f35633377111526f3e271c44
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and other disposable hosting. These links likely serve to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/9be0fe1ac606b542040d8d9d6176aa5e/ravekujewamelitanaki.pdf In PDF document text
    • http://liccuza.ro/stiri_files/file/84841877846.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/75440974813.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/81546475716.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/27079839074.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87535396068.pdfIn PDF document text
    • https://ka-base.no/images_content/file/jolofowunusolowafafojop.pdfIn PDF document text
    • https://www.almuhja.com/ckfinder/userfiles/files/15262960304.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/bstkfv98lmnb2jqlph2ksi9nd2/kakoxomewopukoxag.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e7657da5504---83174738046.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/pilitajubodomomapefawavow.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/8670096041.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/o4m3ornhmhur0obcim8mm11jd4/dasalemagigunowod.pdfIn PDF document text
    • http://debden.org/userfiles/file/doludevawuxufemixoguvem.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbb88ed8e0---xedomugedokolobi.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/deca147a1bb580fa846df62d6a43a482/69356258637.pdfIn PDF document text
    • https://www.almuhja.com/ckfinder/userfiles/files/76123115695.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/9791695540.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160875c43de430---wurigutodexo.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/gimozosab.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8657a133f5---xememekajunevate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=biology+of+sitophilus+zeamais+pdfPDF link annotation
    • 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_off0000d012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD012 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 11068 bytes
SHA-256: 66a4e071ad3c09a66b0a5fb0f876f8d6b9b5453770e7a04ffba9f7cf4c36b8e9
font_02_sfnt_off000101d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D8 17520 bytes
SHA-256: 7ccc63e9226ca233f78047e91798caea285b907f4c3d12e99f4114f8cf886782

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