Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ebe914982d2351…

MALICIOUS

PDF

79.9 KB Created: 2021-06-30 11:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 00d63e4129c248398e060ff1e17b6637 SHA-1: 081ab9a9dcb15f5a9513f2bd307877e2ca45d5c5 SHA-256: d0ebe914982d2351b397d961998a6055ecb78455c719a983b9dde520c28c47f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://irlanc.ru/uplcv?utm_term=learn+to+fly+2+play PDF link annotation
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/41301e4f83eeed3bf52d0802589f3fc9/taguvitujodufarolituf.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de9f959b1e---lawukafurotodatogilivo.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/2a2481aa0578df841db46479354dfedb/55503077683.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090d69a4f159---47758931525.pdfIn PDF document text
    • http://servmed.net/userfiles/file/55175419235.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070aca4a5675---zuxibewena.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/5512a8806014f77570913fc02515f68d/lepokitukukutejabolile.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/37128677040.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/1mkhn9lvhc2qd6ghtsckd22ilu/nikadasegeporuvixovajorik.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/cb5ac61810bef5f1578408a25b1df701/gorivukuxibil.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/34643759844.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/28486096939.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/lenavonuvumaxu.pdfIn PDF document text
    • http://edgecs.net/documents/gedivibumeseruzupeko.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070505e52ede---fopeseberovexozegosuro.pdfIn PDF document text
    • http://zuche0551.com/upload/file/74267854284.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/nekasesevive.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/mowubuzegimad.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6b947ba1b---74363228162.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/77409659594.pdfIn PDF document text
    • http://soupworld.de/upload/file/70928605722.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/b3f1f9158046499596581a6276ed7a97/zisaduduruz.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/jamozizizimakofimifow.pdfIn PDF document text
    • http://i-dron.cz/data/file/joxidiwekozefe.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/88fd62bb91e4fb1d7afa231105d84cf6/vusosowaverixalilusu.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_off0000d7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F0 16620 bytes
SHA-256: bb2b8a45d6bbceb401dea2ebb6a4196e337f40e29563ffb7b0c413b291e2b7c6
font_01_sfnt_off0001032b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 10284 bytes
SHA-256: 76766d84f121db89a2aa0d49ecda8f2fe80891423cae1cefb662781c74823f8b
font_02_sfnt_off00011a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1