Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03fb857e53d645f…

MALICIOUS

PDF

79.0 KB Created: 2021-10-16 00:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ca43844667d4462344832f5d68e097d0 SHA-1: 37fdcd30bb7b487ee9f3557719d3927fff36dd70 SHA-256: d03fb857e53d645f74ebc63aaa2423de0af56f9ec014d951ddb4ad0754ea50c5
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed that the PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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://istanajp2.com/contents/files/5762072507.pdf In PDF document text
    • http://kleinschadenexperte.de/userfiles/file/86426628205.pdfIn PDF document text
    • http://entrackintl.com/uploads/33277147824.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/dikajopujokakobemuvelu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/6f4f9ef01255844bcfdbc2f6ecb50b5c/xunanajisaru.pdfIn PDF document text
    • https://beaszemin.com/files/52119834829.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/jasete.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/nalejuna.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/91193969116.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20211001_79B14C269582B0CA.pdfIn PDF document text
    • https://eklyps.net/images/file/46402997491.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/33huht4bbb3hsbnel68v3osnf2/20199349449.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/karaxu.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/vgs66jm5uidrkkmioki62j3bsr/vopekitejizojutopiges.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/28677379341.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/kebijipujuj.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/fadaki.pdfIn PDF document text
    • https://patriciogaete.com/upload/file/pudovejaduxanabapi.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/75481375658.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/36290652217.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/68426353335.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/6829652839.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/39664364411.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/6Zflnl449io/uplcv?utm_term=it+is+done+in+hebrewPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 21420 bytes
SHA-256: e1c80cfa4cf89b63cc0da780343979c4fca643a1dbf786f37f06fffa2b5bbbef
font_01_sfnt_off00011cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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