Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e444c10ec41e72…

MALICIOUS

PDF

72.0 KB Created: 2021-08-10 19:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 69ed5925847f311c2f3b6a466baa2544 SHA-1: 1f583c91bee100879000ec359d26b429da2874be SHA-256: d6e444c10ec41e722201b64422706830161582f9384306aab316db9185e4ccae
154 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9352

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
  • 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
  • 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://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/15e909903a423bcd3c453321a579d623/91046559483.pdf In PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c25218cbb0---2118937951.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/rulopenapubikabel.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/87982645023.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/majimeberufulubelime.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/rekogis.pdfIn PDF document text
    • https://anfauglir.com/images/file/pudasesenabujoniruvefi.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/lowajile.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/newusugodivorezerolag.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160ae06d7ebeaa---gewivutonikix.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/66127726338.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/9adc91019f46ee9567f4cf88f6c6cac4/83539035334.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/rolijetamosewimanev.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/69892015159.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8f208544a---xefepoxeka.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/petodimefagexule.pdfIn PDF document text
    • http://skupka23.ru/upload/m/lukewira.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/92619eeccce8e1c92b32cd0f8daa46d8/wemimaxab.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072d39b3e9cc---52702401638.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/vupolotefabul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=formal+resignation+letter+sample+templatePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 10572 bytes
SHA-256: 207eef89e04af0efd325ee62fb7d434180ce659566b7c0c57a462de121f340c1

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