Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f30a5b7597dc32d…

MALICIOUS

PDF

69.8 KB Created: 2021-09-01 04:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6e99081cb4d48f136aea05c80fb9dd2e SHA-1: 779d5249185d5cc44c66f9cfe7b77b2d79e2b97b SHA-256: 0f30a5b7597dc32d5d5a8bdab864b71424b3bea7375401529590d3ca42830d71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate malicious intent, specifically phishing. The presence of embedded URLs and the nature of the heuristics suggest the document's primary purpose is to lead users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=java+if+not+equal PDF link annotation
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/3d7e20bf240af7a357d41fa749467e2c/nivodawa.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16099b872a8052---kuvawafumi.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/24433415791.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/nexoje.pdfIn PDF document text
    • http://annabarons.lv/files/files/papuma.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/61416909275.pdfIn PDF document text
    • http://vvk-wiedermann.at/userfiles/file/38333163971.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/53190536844.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/pilararobesam.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/10585065961.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/eagjsa14qv1c8tfc2b88bfen21/jatovudupo.pdfIn PDF document text
    • http://yilip.net/userData/board/file/21433634443.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/20711141104.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/numilazuwasezifiz.pdfIn PDF document text
    • https://businesslife.com/content/file/zinubek.pdfIn PDF document text
    • http://canvangdientu.com/images/file/guxedopixinugazatita.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/86992885918.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc9b27da16---lawidobuvabukaw.pdfIn PDF document text
    • http://www.polni.si/Images/files/83831812333.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/nenomadijevodesax.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/lozituwefiwomitarejiw.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607de6d1d20c4---45218959234.pdfIn PDF document text
    • 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_off0000b5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CB 10244 bytes
SHA-256: fd9fff00dac08c19971742ba8f67d67fe28bf33665e770d02c915d502e43deda
font_01_sfnt_off0000ccf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF3 14436 bytes
SHA-256: 58b665558c1de8538949432e92e33cab06500735fb806e302e4aaa1e3a97f047
font_02_sfnt_off0000f0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1