Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15c953b9bad78a1…

MALICIOUS

PDF

82.4 KB Created: 2021-09-01 07:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6916db0a38e324e8daf5e031f50131bf SHA-1: 9ef88c33c77dda3dd19e659bb151ea3c56c15b24 SHA-256: d15c953b9bad78a141a6fe67688d4f5bf607512fc3a6f7a6de86785bf6ee6b3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pistant.ru/uplcv?utm_term=types+of+globalization+pdf PDF link annotation
    • https://dailyhondaotomientay.com/upload/files/digoge.pdfIn PDF document text
    • http://robedecreateur.com/img/files/61078476757.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/32425417247.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ofduj4pksdotbg0mfhjsosgmv6/zoziganiwukegivijiki.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/45737786957.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/33073666006.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f85e4c153a---42200455464.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/db375253b6bd3ac818695af52907e3e9/fakatakodivipudi.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0b6cecd69fa9a607ab01b5d759460697/toserunajutagasinudomikat.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/28073544930.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210610_07C9FE74BDBAD1E8.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/gujiluveto.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16124b7a75eead---venaxinezi.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/xowokodozamafajona.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/43643320494.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/247olhlqs7n576p2u9ve4i5pk6/29397039596.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/0ugvitl5sgmpb3dv62eiueoaf8/fagarutinajosareka.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/940054127fbde8124ef2e00c4890fee2/gafeg.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/70686236687.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/12756891631.pdfIn PDF document text
    • http://konakelektrik.com/userfiles/file/58943426808.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/89296738633.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/kesekujiwizaxesujane.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BC 10852 bytes
SHA-256: d71e3b15476cc31e35e5db6f19c17ebfaaf0ca453bb37accbd5cf14f763cc47e
font_02_sfnt_off00010f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8E 17288 bytes
SHA-256: 418e71b24298c6ff76b0f0f8eef5d9cc87f8c5a340b45ea7f8b4588d47a32119

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