Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69cafe7c6caaabf…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 17:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 930096d3e249d41161cfc8c5d7a389d6 SHA-1: 6833cb24ef5fcd048cade64c1352453c38312890 SHA-256: c69cafe7c6caaabf49acb5d99eb7fb79623e059ca303edbbe2901c149cb496a4
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to external PDF files, suggesting it acts as a link farm or redirection mechanism. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a pattern of using disposable hosting for these links, common in phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://3asoft.vn/img/files/fupejefipewotipajulufe.pdf In PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9615419484.pdfIn PDF document text
    • http://warehousetraining.ie/images/fuzopo.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/luriwifasasive.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/45329299284.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/25725093674.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/wonenedop.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/50691223863.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/sagawulisujodera.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d087fe1c0e---sijaji.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/lemikulajogitimolareke.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/30001809242.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/rusaxakafojuzar.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/mitegobemoxevakifajo.pdfIn PDF document text
    • http://spbi.cz/res/file/derujobesage.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/21298908641.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/5460710858.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109080024381789.pdfIn PDF document text
    • https://architektor.ru/uploads/file/16382304999.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/071835076554.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/20219317458208.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/fagokazasejemakuv.pdfIn PDF document text
    • https://safarekhoob.ir/basefile/safarekhoobir/files/guperavujoreloxag.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/60606346135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=two+letter+words+starting+from+aPDF 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_off0000d997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD997 17976 bytes
SHA-256: 0552b3a72e9e3e003dacf48df727bf7367ba2cdf3b9346d9c1c788d70edd3b3e
font_01_sfnt_off00010854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10854 10744 bytes
SHA-256: 3f06a3db0db4fc082e465225a2459b2c92222b01108525963f5ee12835f6cd7b
font_02_sfnt_off000120dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.