Malicious PDF — malware analysis report

Static analysis result for SHA-256 00058857d3c00516…

MALICIOUS

PDF

88.9 KB Created: 2021-09-17 23:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fd626b5c99bb3670d01c833a89f0d6cf SHA-1: 872eac808dcfe314f01eb9c9fd67a7fbf4dfbcfa SHA-256: 00058857d3c005163c8c65668911c371cd5edfbccb958c6748973348b0d5403e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded URLs, many pointing to domains with unknown reputation, and is flagged by ML classifiers and ClamAV as malicious. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to potentially malicious sites for phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the embedded links and the ML detection suggest an intent to exploit users through these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kimansion.com/uploads/file/sunerumad.pdf In PDF document text
    • https://baxsporthorses.com/userfiles/file/lizimupulazowesok.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/95041487434.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16143ebbfc6271---3606315023.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/37989117605.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-17/20210917222039449030.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/1023009181.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/53186724047.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/jowikebe.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/24181143903.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/45653701259.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/81117136379.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/90890023175.pdfIn PDF document text
    • https://limsurdua.com/contents/files/ludamodukunebo.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/3491071457.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pulvo3iva3q5pei231nli13093/jamibutizumuruletiv.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/dedutonuxenunumuza.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/nosevefomobipenuxuviga.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/mokesuvupadojisemibefej.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-9-17/20210917111329104197.pdfIn PDF document text
    • http://kccmaul.com/files/files/xefavofud.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/50155513671.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/kiligeremilulitow.pdfIn PDF document text
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/pokimumote.pdfIn PDF document text
    • http://reopen911.info/media/file/timewezuwidilaginigo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=shoe+race+iosPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4ED 22776 bytes
SHA-256: 0dac4cc08ab143a55df83408456fbdc9fa24554c72a03afe57009fd9955a2857
font_01_sfnt_off00011102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11102 10152 bytes
SHA-256: bc20d81f010bd4c6e757bf39d3872650a7a0a5ffb2de8d3781eaaf6f3d40b261
font_02_sfnt_off000127ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CA 16212 bytes
SHA-256: 06f75ca824e33c594950714454ca4dc3bf670c28b947b5a2dd9f30d78c5f8ab5
font_03_sfnt_off00013da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1