Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd2869b07c2ef7b…

MALICIOUS

PDF

88.6 KB Created: 2021-06-30 23:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 206e298430689167ebfb4ec4ab9c781d SHA-1: e3d70a0ab2f7bed3acc830aac2cd605d7a3e52f5 SHA-256: 1bd2869b07c2ef7b5303ff1d07ebb79ea7478bf411369a6e2f29d7b78ce4511b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing pages or download further malware. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://home18.ru/wp-content/plugins/super-forms/uploads/php/files/905197245db580a31b7fc83f81e8c2a8/21598325797.pdf In PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/c22578d2cc3b174586d6f5345442c788/89704752676.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/3ca1a3389feb91ad7c52484a5691429e/xijokaniwilek.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd735ccf51---jewakot.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/84984078644.pdfIn PDF document text
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/48335017250.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/13187989945.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/19424625578.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/4tie81t86l7s50mplc0v31jq0t/noxodirefajov.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/efba281cf602697d17c34267b4779435/kumoluvoja.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/27552009520.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c973e54959f---62499792630.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fefe956736---31060578646.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/fexexeboromamenuzefox.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/9ce59373cfcded7b3cae41d18b50d04e/legawusemogiz.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/ca82696ea4bc0a951a7832b079d5968a/98172049834.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/salati.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/vibikewubara.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/056a7263e84fcb25095c6650ada06741/delal.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/mowuduvafowo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=spinach+and+corn+frittersPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38D 1824 bytes
SHA-256: 065c7a4f11f9e75f6e8b37807bc82b370f7b2846456f0b3b832c619392bb01b8
font_01_sfnt_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 18264 bytes
SHA-256: 617001c4e39caea9332e5fb2ca71e8387018441795c7ce92e9a04c8ea139210b
font_03_sfnt_off00012466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12466 10748 bytes
SHA-256: 9095289b457f4d00218640b8961015ce44b10d62416e26a972a778bf9ff1ab74
font_04_sfnt_off00013d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D05 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d

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