Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbe2b8e3eeae04c…

MALICIOUS

PDF

93.7 KB Created: 2021-06-29 19:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b84a3b7dcaa7093cbe7f2cd36be2e41 SHA-1: f8e3e1f5acd61e2bd778352f1720a3a29a4cf0a9 SHA-256: 2dbe2b8e3eeae04ca3ba3fbc0ec1123338d806c0fe6ed9172fb8c601376e06de
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious intent, including links to compromised WordPress sites and a high-confidence ML classification. The presence of a 'download button' lure further supports a phishing or malware distribution attempt. While no scripts were directly extracted, the overall structure and URL patterns suggest the document is designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/aa34f39ec8264a517b68a3110bf499aa/nugawedeketukuturoto.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/5e3fba8bb4f625afd655c5579a686b00/xukivetodowukobokatizu.pdf
    • https://anfauglir.com/images/file/66069227618.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/160348c8c2dcabcd5790832588264d2f/45084588240.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d5ea3e75f---matuzuda.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4387f1c277---belop.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/3e84b426a0a7dec0f12cd75484b0137f/mejelipowoloru.pdf
    • http://tfforming.ru/d/files/xilasobubejowarisoxe.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d357d1d471---16259783815.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/6ed84fe70b7173553720b068b0842be3/sodasisezudugokafob.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/433fb13bf439e3567803e33aac2b5524/sigumivarugopesumoxav.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e54f91dcec---58694708587.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872ef842ff5---35708327855.pdf
    • http://aptatravel.com/clients/4/48/489dad2d2d8436d4c085fc0ccdc2d1b3/File/tobalapolewinage.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fca199139---sufudenabifusepuvanor.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160878ee825097---ratoxopaxufekejegejefemu.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/0c357f337bd18e163f79183c4171abe7/topunogazuvo.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842fb63f6c2---vegujuwojilokizubuji.pdf
    • https://bisnismedsos.com/userfiles/file/kanavowuvitasirovaf.pdf
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/906140811.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f939973a9---75096611703.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/db90979f5efb26107e5996543692ac20/92613928621.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=astronomy+daily+picture
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a11.bin
32a27a3fa59e516957edb7217eb631935d92dfd024ac6d603ba194a546f9ff65
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A11 17680 bytes
font_01_sfnt_off000138ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138CE 16792 bytes
font_02_sfnt_off000150e5.bin
c8f82d58bfd6da27c1c1f2a18bfa380759ab76cbfb2b64ee9505cf318c30e531
pdf-font-stream PDF embedded font (sfnt) at offset 0x150E5 10872 bytes