Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb7da409cfc1c5d…

MALICIOUS

PDF

74.9 KB Created: 2021-09-02 18:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 89d91298c562c8d088b1168a8c7fe2b1 SHA-1: 821cb8fb52554d6d5e6b61947d72d6244290df51 SHA-256: edb7da409cfc1c5df66af79caba22301ff63ae53de8ccd0ce9ec15ac4c2817cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://crysiq.ru/uplcv?utm_term=nippon+paint+colours+chart+pdf PDF link annotation
    • http://telekommarketing.com/firme_data/files/91120136225.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021070706103573499.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/28600391746.pdfIn PDF document text
    • https://e-room.co/userfiles/file/natomufitover.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c178034c3---sisefinuxinum.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6b7c8debc---sozuwaxemeletip.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/35ec6bb26e0d95a61fe493a9a5bdb759/33922252074.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/zugoreropiditonasomar.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/33842683053.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/79616425987.pdfIn PDF document text
    • https://egca.fr/userfiles/file/xisaxa.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/roxawek.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/66864068315.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/85f9ed34e5ef9eee5445d4131194cd15/weguwoxidisozif.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/lakemaboxamamafamipu.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/31573307636.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a2270655---seleropifudebovasi.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/db1a24d2bccf529fd25859644a6e8d67/1451755049.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b310fff1498---22198655881.pdfIn PDF document text
    • http://lhsclassof77.com/clients/34792/File/21296704466.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/15c967b0c012cbb2ae49605f92c32b7e/96299524008.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/6e9dd910ddedff497b7ae063609230dc/56293870139.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_off0000c4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D9 10660 bytes
SHA-256: 38d0d318783d1b9f2e7808674ff30f3ba0942620ba58e7981e9b7ca384bc33ad
font_01_sfnt_off0000dd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 15784 bytes
SHA-256: c9a1e3d61f98517130a6fe25b95d65db1eb64c30bdb564479a20878a9284dfdd

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