Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e93d0b806d8eef…

MALICIOUS

PDF

83.8 KB Created: 2021-09-20 07:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 66320e27e7fb68949b386f0feffec862 SHA-1: 1e86ccdd7934035ea73f6594c42129debd527ba4 SHA-256: 29e93d0b806d8eef251e9f1893d129c45d11525ec94da792412f4b1c07fd1b5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to multiple URLs, many of which are hosted on compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL targets point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drinkpoint.com/uploads/files/59562985747.pdf In PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134da123b8d8---67009062929.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/f516687dd8342b93ea15d08b39e09874/93525378823.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143cc1023cbc---68640729736.pdfIn PDF document text
    • http://egitara.com/upfiles/files/kujodibiju.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/19540454984.pdfIn PDF document text
    • http://jadeite.ru/images/file/51132605390.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/gifolidevi.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/68469248934.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/wilixu.pdfIn PDF document text
    • http://wjcopy.com/upload/files/91390387114.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/mataresenefejobepumo.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613182f223731---89083695959.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/161446de433504---jiwotinalikenubatu.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/fixila.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/22143803392.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/goxuk.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/40fe0b10202b96a30b6127b867ce8ec7/dipedibulugexufuf.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/17178148789.pdfIn PDF document text
    • http://www.centralperdana.com/file/kukosire.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/59259483520.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae083671fd---70369021830.pdfIn PDF document text
    • http://jamxmpharmatech.com/upload/files/661833923.pdfIn PDF document text
    • http://balalajka.nu/media/13100311576.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=themes+samsung+galaxy+yPDF 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_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 17928 bytes
SHA-256: 328710aff19ca129f50475bf2020ec325678369410a1920183bb362ac0463c8a
font_01_sfnt_off000111f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A09 10424 bytes
SHA-256: ff823b51c5995e09a1f302cdea913efe15e8cca5e9eb607f3d5578c463969675

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