Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9ad0262e25b0f1…

MALICIOUS

PDF

86.3 KB Created: 2021-09-02 01:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9f53e77cdc0e4d3484aa95ca73529a16 SHA-1: ce696d47c0082fffa455f6add3581ddfe622b277 SHA-256: be9ad0262e25b0f1abd88ad46e0113271bb006f9c646e748ea2a271aff86ef3b
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609afb371edde---2978439376.pdf In PDF document text
    • http://bptramptour.pl/files/file/59654481185.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/87389307968.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/38db7da283a271366548cb2157fb344f/55748198181.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e976c06bf---38890334355.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/o0kolt5damgtjhja9988t13aa2/nelibozisoduvo.pdfIn PDF document text
    • https://ms02bet.net/contents//files/kujotete.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/gadiwapevitewezevugemaze.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e51522eac6b---29133906002.pdfIn PDF document text
    • http://sooclose.eu/upload/File/xebefusafe.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/6556f72550499b4e6dc2f686c4d02163/jipigegagijavugodivenuzes.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d272ae7b8c---94833128840.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607131f66b8b8---44359334836.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/1895255400.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0cfbe80c1---jurizuxewixafeg.pdfIn PDF document text
    • https://vnycc.com/userfiles/file/fasudutomifavitidigomip.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/25520609724.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a676feda32f---41752155369.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6b985a3bb---masevidubesopuvapijumov.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160998d373ee2f---zupevizegipamokuj.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/relevufiraworu.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/a0da4c0e6569456039563da5fb5cc8f4/86736177970.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d82a2f47de1---68563731060.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=authority+letter+in+englishPDF 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_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 10420 bytes
SHA-256: 4dc4b88730d09dd0dd1631d5d076899b1be1b8e4dd1c8caf9fc889270705454a
font_01_sfnt_off000101a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 19524 bytes
SHA-256: ebe484d043b8ba3fd7cc8836b3fbc52421a7cf67bc6b57089c3e115c4fa4076f

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