Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eedfc29082139e5…

MALICIOUS

PDF

75.3 KB Created: 2021-09-18 13:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c315b4728eb3e02e2630989da5499af8 SHA-1: bf239fb6bb69b45166cd4ee6293eb39fbac80993 SHA-256: 0eedfc29082139e5994b6d2bb3fd248b591337ed8cc1029feb7d6170c533ad23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on disposable or compromised infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://cuacuonnhaxuongbinhduong.com/upload/files/figosekolepuwa.pdf In PDF document text
    • http://reopen911.info/media/file/1290591726.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/54752086557.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/a210037bfe20731709b1b752da81c9a4/10359150881.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210914061524.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/475935557.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/fasixamufelebore.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/83624643456.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/92372941848.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/12242167474.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/vipapifidofefater.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/nubexoxoluxujilepupusimot.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136aa25513a0---25824616279.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/zifinavijoleza.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0fc47ce4a---kunusar.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/68145344621.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/b66c1c9582b99abca7fa9c1a6d60738e/19818405611.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137227621337---73460409689.pdfIn PDF document text
    • https://slide-bearing.com/d/files/11753281762.pdfIn PDF document text
    • http://cosyromania.com/media/file/21990889483.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/47842440813.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/nijosoga.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/gelubegafosawoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=malayalam+kambi+kadha+pdf+downloadPDF 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_off0000bc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49A 20476 bytes
SHA-256: 713845ed82d2b9ef21d27f40b8ad3b701b3c0c9a9405cf28796472160bfa5494
font_02_sfnt_off0001078d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078D 10688 bytes
SHA-256: cc69daf5357f3a844c0b58b463b4e6818c8bf37bbc1dafeac5130b93ce868eb4

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