Malicious PDF — malware analysis report

Static analysis result for SHA-256 e414f6d1b14e7bdc…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 06:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7027f575941e41af1a6a9e984512e3b6 SHA-1: c3b6629efc8afb3456d74f10069c2af97e98b971 SHA-256: e414f6d1b14e7bdc2f521bc2d5c60f806a1cec1e824f57a17324383d89c626aa
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV and an ML classifier as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs, while some are marked benign, contribute to the overall pattern of a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://archidaldegan.eu/userfiles/files/76387944538.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132fc576ff53---49774851489.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/11583023673.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109011953363184.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/tuxunatapasotamesiz.pdfIn PDF document text
    • http://greenglobepms.com/uploads/24547413049.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/tesovujuwidopif.pdfIn PDF document text
    • http://retailcop.ca/files/76904197871.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/migedepawupemazi.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f418e041fd---97409421607.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/85140305040.pdfIn PDF document text
    • http://elitacasa.it/images/file/tuzavaragakuroxu.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/64464153105.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/dabedurip.pdfIn PDF document text
    • http://i-dron.cz/data/file/rovotaluzezavigezam.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/70262404433.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/mobexuwarezamagezabe.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/zibirifiwowu.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/detejapoxoma.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613af71e4f16e---jojezixuwunowi.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vn62l80f8isc90893koemdg9b0/5584873805.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/52944810104.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/kipeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ultdata+android+data+recovery+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_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 19164 bytes
SHA-256: 7cba47bc40b605d7a5543a93ce50384f5f9ff9f92aed55b2b77210f10f16baa5
font_01_sfnt_off00011454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11454 10468 bytes
SHA-256: 88f73de3ed80527e92b91b8f1f6c55427c32a3eb30f8671d59a6f407b4a38dca
font_02_sfnt_off00012c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1