Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4e531708461eee…

MALICIOUS

PDF

94.0 KB Created: 2021-09-02 19:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 902c9e606aa3195faec58af5e54452ff SHA-1: 59aa735247bc3bbb2096dc131ff6b126129b97b5 SHA-256: 1d4e531708461eee76faa71db3ae2b18a5ac02615303ca0431ace3fac9195d6b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. These links are likely intended to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/srg9rld4ngh760i1ajoh5k8n16/fuxikesaxuvaginafesurinu.pdf In PDF document text
    • http://ajisushionline.com/uploads/files/rilufikopenozu.pdfIn PDF document text
    • https://promise-land.com/upload/file/15240297926.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/e0g5s05tagcraug67ve4f08qjk/55923242994.pdfIn PDF document text
    • http://wardwrightself.com/clients/863644/File/55254875010.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f05dadb0cfa---sesegogajirebobij.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc642b1cb0---89301068644.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/vofepesesomizixiteduzevo.pdfIn PDF document text
    • https://angkagenap.com/contents//files/vovufefubijumogurakizixeb.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc1e1dcfa1a---vuvuzakoseduxabigulesoj.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/garavinisuwug.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/76791606091.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/gamadideduji.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58899114797.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/82664106713.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/fotuguwoxosezisumatavozim.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/8vid29ntfqg3mfiqhubcu5s0hb/wonoxofojexumaduxa.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d654eb145b---lujidiwexikadetiraloxe.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/l6d67sbj7ekhf3h2kl7hp5s95i/74486049615.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/51099031588.pdfIn PDF document text
    • https://btegypt.com/file/67281695.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/fobeb.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095eec2d2dca---37259391095.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/kumaforajimifetame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=strike+the+blood+light+novel+volume+7+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874d7e96bc3---23480871078.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_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11279 23004 bytes
SHA-256: 37acc091264f13f2a957a71e34eda16f2987d34e2276cf24c79e541e1338a293
font_02_sfnt_off00014ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED6 11136 bytes
SHA-256: 051a425bbc7343e47c85b895bd5c83fabecc5514e91ac642df50693de58d37a4