Malicious PDF — malware analysis report

Static analysis result for SHA-256 209e020bc050d0e7…

MALICIOUS

PDF

83.9 KB Created: 2021-09-16 15:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5f241444d5ce8843740abca8a945696f SHA-1: 37ffd83e8267c26e6becd251779b9e2abe606dde SHA-256: 209e020bc050d0e7a7f4763c7bdc9a99f26a7fd519d7d9863cd5e56c90136672
204 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting, suggesting it functions as a link farm. The presence of embedded JavaScript and the nature of the URLs indicate an attempt to redirect the user to malicious content, likely for phishing or malware delivery. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a potential secondary stage involving password-protected archives.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=droid+maxx+android+version PDF link annotation
    • https://koratspring.com/upload/file/zapovemimexukezununo.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/vebokexosibopiritani.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/6mqq7ugioh6223ttmdq7j0ppnc/74626235663.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/28640294186.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/pukisul.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/14603518850.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/92883573546.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ee6t20docekv6co5dg84aj5hd6/jarobosefinogi.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/15245164253.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202109061544172792.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/10876989799.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312fbba16c4---7486158062.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/wakuw.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/6e68979ac18ce3a5381d220f58d574c0/zemepokitima.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/61350642936.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/vudituwosomuxupelafajotub.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/pefetamurugudij.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/73756017473.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210912235247.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210911141111.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/70509442665.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///87539533609.pdfIn PDF document text
    • http://recepti.plovdivweek.com/js/ckfinder/userfiles/files/88503595833.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/31855441633.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/jizakupewizi.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_off0000e3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FA 10436 bytes
SHA-256: 069cdda0794b12b7c6aece9b6f158b8f4a838a66594f8cf1b2de3f841cad9eec
font_01_sfnt_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 17852 bytes
SHA-256: 77dbd498bc034f0fe396f98e2d6b50221f828b3e7bdc37260fffb001a944b339
font_02_sfnt_off000129f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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