Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9db1baf7206f526…

MALICIOUS

PDF

90.8 KB Created: 2021-06-27 03:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ca347ac384724ed5396e5848567ffa0f SHA-1: 0f1705f657b76f6792bd496b8c09c29a6f06afd4 SHA-256: a9db1baf7206f526649c34f17dcea13937bd505977de1123b3c924ddc5b69f48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious files. The presence of external URI heuristics and link farm indicators further supports this attack pattern. No scripts were extracted, but the overall structure indicates a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • 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.
  • 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 http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a8157ab5647---rugapazezejax.pdf In PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/0f4fd3218e04955aa62d22d50d872d1a/53871220705.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/q4akfttcccbahgtnli8cnp2uo1/rekopir.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/bd639f8dba952ec0c2d9fa1dfb58b62e/nasemanud.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/xotukakefotatas.pdfIn PDF document text
    • http://rsst77.ru/upload/files/77401367432.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/javuxave.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/13534247194.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/figaf.pdfIn PDF document text
    • https://hse.tw/upload/file/zoxupupaveniku.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/75882321048.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/vugorirufuxunoxe.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9f7a6b96f---vapunesagowanada.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160955a38ceb33---wirisof.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/tigolivemusos.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/dufesajurexig.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/gagexujirebawamidales.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/belozuwagisoti.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a46d281016a---16111226753.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/p2fotu5cuj1q4ak6tv67mhq3i7/sexogizun.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/28611901416.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/f0735e5b03a8a293054ecfde1876b620/dizimafikumab.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/nenuxolu.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/zaxax.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/45347657378.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=bully+anniversary+edition+download+gratisPDF 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_off0000f9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D0 20296 bytes
SHA-256: df4100962e0df5cacc5b84e2e946756b8be79b4c37ea32dc39779c9c67d41f24
font_02_sfnt_off000144b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B7 10844 bytes
SHA-256: 02f833f5e0958293547e9ff9a87f1354e815161435c2b80e5290644b40322a50