Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6acf2e55add0f32…

MALICIOUS

PDF

82.0 KB Created: 2021-08-21 21:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9da51de1152d8e419d7dac10fe8cbb79 SHA-1: 10d3002ee6f2e815a9a0bb529650e20ed005ba48 SHA-256: b6acf2e55add0f32a2ae31a5f3197c2caf7c27b570eb10767031875a293f3d54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://inwebjor.ru/uplcv?utm_term=niveles+de+organizacion+biologica+del+sistema+respiratorio PDF link annotation
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/4o9rnah1s8o7tk39cl0h53t0ra/97988926843.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/72259690872.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/82a0db36a6402ec2e9c2ce759f1e6df5/52224778523.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723b222b1bd---migegitas.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/pezinuvuse.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/58812b25f11bcb7bbe21a12bd9330a10/kegowijekopakopinevu.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16096819206cb3---56155140502.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c9d10e61e546f1007ae67d674d1c5cb9/kekud.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/dd968db79c3c7a073e34a2a7c8783c58/39637320265.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/18594e7d85b8cdaf7bea04e54806f18b/16826182809.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/56250649409.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/kinutiferobumumanas.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/rupawekizaletirozepujilur.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bca1abef3aa---gexetupo.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/14503970417.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/muzajunedub.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/pagoso.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/36945792168.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/47skdiubqn7242ere97plmqvn4/bumineburezufutinib.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/koloxepapiwijanepesigurep.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/46486371896.pdfIn PDF document text
    • https://soechi.net/userfiles/file/nazarutumigudot.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0098766d5b---65650487096.pdfIn PDF document text
    • http://nfc.soo.jp/file/13714489062.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/85612202180.pdfIn PDF document text
    • http://hanifeugur.com/image/files/55996769004.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_off0000d8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 11100 bytes
SHA-256: 078dcf84d35009b8b3c60a5312662e314571389ad9a5ba7b06e183a884be48c7
font_02_sfnt_off00010a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6A 17504 bytes
SHA-256: 92bec9a18e5477ba6a47e757405d0c06d646d728275f3939aa691075252f833a

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