Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9f03119ff5e43d…

MALICIOUS

PDF

100.0 KB Created: 2021-07-14 05:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 33e7cdff3cb4171a72b71aaed6190271 SHA-1: 0864e324cf48a3edb4d4998a46545559c4279704 SHA-256: 4d9f03119ff5e43d5cb39d51bdb160ea1c5038a09854c633ad6290070bbc9c89
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites and other disposable hosting, likely intended to redirect users to phishing pages or download further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pixomot.ru/uplcv?utm_term=dog%27s+dew+claw+broken+and+bleeding PDF link annotation
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/5fmelm7aasncknolcpi3si0off/wagiluwe.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6431b8bcbf---67860777978.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/fewoxi.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/fonud.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793eb14747e---livofodajaxi.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbb58eb7d3---24352557006.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e872adc1df94019f6d378eb8d26c1e03/nosabobarineko.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/rutunesa.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/95124174660.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b8fa51054---bajifigif.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/lixak.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/986279f62de98b00f7335fd8c680a7f0/ruxavakuruniviz.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d80fc116b9fde1faa4f8b44a9b43dda5/4498441563.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160852e0af3042---rofozanifo.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/4c3afce4337a802108a3dc80e1e0fba9/lunefuzufipapabulubita.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/93934682282.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ab9d7b78---81807977769.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c823aa6073---69725443327.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/ef2eb3163f3c3e72a89b5f09dfc13b7a/kewefuxetulafuxemol.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa051232510---28410877124.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/48594916114.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b057e3b2e---19507562260.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_off00012283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12283 17604 bytes
SHA-256: bc2ef5b3a7892d3069c3b22f4815f95e08b651f5eacb48e241f749400bee2b2e
font_01_sfnt_off00015033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15033 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001684a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1684A 10800 bytes
SHA-256: c03d67908b1a23f5a5b96fc447dc2e7674eeea61621d00af0b1cff7bac5d2f4b