Malicious PDF — malware analysis report

Static analysis result for SHA-256 5927d0ce6ed0c95b…

MALICIOUS

PDF

79.1 KB Created: 2021-06-13 11:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 447f2ffce4b1aea6cf9e941955532f16 SHA-1: 5d5c1c3a3649b7e5eb3d2730bb98f96f530d5d3d SHA-256: 5927d0ce6ed0c95bd14155b64ef9beac8fad5adb2f9672c7505327441a8b64f1
164 Risk Score

Malware Insights

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

The PDF contains multiple external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://drafthe.ru/uplcv?utm_term=toss+em+all+apk+download PDF link annotation
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/08a2b44e1cba23709c3b140465729607/sexodeli.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/fikigajunoni.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/38402520758.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/37790486475.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/44539438380.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d36dbb90b7---21054756004.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/36364812908.pdfIn PDF document text
    • https://kham.vn/userfiles/file/rixozelujej.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/zaminivotulavisimibedu.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/68957486254.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607523f79c840---59632179592.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb5ea0e2b0---tirumiwato.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/3616317388.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160783b7791a3a---13733974186.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16090189e1bbf6---tejewidi.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4a3b7fa6d1fcac3920419b19eb227397/suxinabavom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 3140 bytes
SHA-256: 5bd693c9169e0bef6dd8b3723f43d5aa0294c40777cbdcced00a4ee517a9c92b
font_01_sfnt_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 5116 bytes
SHA-256: 7605ffc584efca0a0bf1642d38a1f77a78b8c815a09f9a89be63a411bc1d145e
font_02_sfnt_off000107df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DF 11124 bytes
SHA-256: 5ba4c350fa7dd1a5a797a87727d518528c2a918582630e5c589b09106e0504c2