Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f39aab00214368…

MALICIOUS

PDF

91.0 KB Created: 2021-08-07 14:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2a69d19e1bb560dfde0934d84e560e36 SHA-1: 3e63df82e3e21fc769c97490d5f8c0a8c69c7cbd SHA-256: 63f39aab0021436848919b21db0e434aaf437005aabc28d19ebc5be7a124b54a
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://edanieltour.com/FileData/ckfinder/files/20210601_FCF4A69EE200B7FA.pdf In PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/a5nht2p8vpvb95hi6msuoj04u1/26827317104.pdfIn PDF document text
    • https://digireg.it/upload/xevobixetitin.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/28565453989.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/golemobixosizovuvinogigi.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/sizexizitetiwi.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/mililagidefimu.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/oj5i5he0qm8mpp5vfsrqo9sokl/fojobejelowixiraxirofax.pdfIn PDF document text
    • http://rotang.net/userfiles/file/rijivego.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/subaw.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/jaboz.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c802ab1f2---75731521827.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/7356930101.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/lalewito.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/9f423963678ef959c99825ed4680f23e/95941289941.pdfIn PDF document text
    • http://asfalon.com/__files/file/sotejojiredasunokudozo.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/4265963140.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c459d106951b5c9607d6a279adeb3a8c/jizit.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/39cbc3e4ebf70e2f9ab9423c7375f72c/gozofoxidijo.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607baf43d3425---37483395006.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c8270f0f630c32dbdd4bbc4fda2b8943/82330159360.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a642a2063f7---josodepobujinalasuxepin.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609507aa287fa---vomopegiwudelib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=hp+laserjet+1000+series+driver+windows+8+64+bit+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_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 17096 bytes
SHA-256: 0dc8c9ffaf9f3c121eb185fb47e9e7da9a42dbca632b8cdfa4055a9081091d68
font_01_sfnt_off00012a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14273 11424 bytes
SHA-256: 87ce3f186293020cf2ffcac20e003ef88393a1d787b797326325ee4cfa5eed7e