Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be69decf31dea17…

MALICIOUS

PDF

79.8 KB Created: 2021-09-04 04:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: af6f525cef4952749f2dde4022532c0e SHA-1: f223e2ad3df59123ddc74c05b03f716afe1f9e68 SHA-256: 6be69decf31dea1701fd261dc02d10c29238690d1af8dc8e4db0b65274cdb122
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to potentially compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute other files. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the structure and URL patterns are consistent with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://stressmanagement-karriere.de/userfiles/file/wixawivazumu.pdf In PDF document text
    • http://train-in-japan.com/images/blog//file/77589605073.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94ba04aedb---31900072914.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/64122809107.pdfIn PDF document text
    • https://orrizon.ru/images/file/70636149390.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875e47a1d78---78221071989.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/14cc1dad982e8d1bb3f33a7f7a3f8436/turesafodalagodinajupig.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/72138682774.pdfIn PDF document text
    • https://parfumzone.ro/files/file/padisovilipokagawagef.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/rizulozesovobabiwulun.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608223cea536e---damaxa.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0b501180f---29849257891.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/busewopetobubiliti.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/lilakoroxadaj.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/ec2ff2f8c950806b9295f492592dce71/32033569596.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/34888703321.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/liboxumojarife.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/kusovavetaji.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160757fea1a1c6---tonolonarapif.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/fabukotuwij.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/88861089748.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608580949a245---garuzepewadiseniloli.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/tudoza.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1627723455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=uml+diagrams+types+pdfPDF 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_off0000d51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51B 10740 bytes
SHA-256: 138ce09ead90b32b22fd7b83c453b872fdc08032e49b0a1bf120fe2bbc922821
font_01_sfnt_off0000ed92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 17084 bytes
SHA-256: 16cf9ff2e5154132ca1145844dee6096c1ce7513a93af4f77c55678785db8cae
font_02_sfnt_off000119f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.