Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd603fa0ff162214…

MALICIOUS

PDF

78.9 KB Created: 2021-09-21 01:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c7df2aabf7108991086c6b253f254d6f SHA-1: ae3633f7f0cb7bdba39dbb84e1e1cd6d0a299fdd SHA-256: fd603fa0ff162214de42e57e0d72bffacc4985b97599731619f785e8be0c5f60
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised CMS upload directories or disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The embedded JavaScript likely facilitates the redirection or execution of further malicious content, while the link farm aims to obscure the ultimate destination and potentially engage in phishing or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://madmojo.com/fckupload/file/16519050135.pdf In PDF document text
    • http://oreade-breche.fr/userfiles/file/8825475801.pdfIn PDF document text
    • http://sissonne.hu/editor_up/96800395523.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/nemubuwarinezililorelavu.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/62939713318.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/toxopug.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/23062561473.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614153342e4e2---76287658583.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/kiwipejisekusebi.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/15758491428.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/kitawudarewipedututonod.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/161352221e0d45---xejakokolewumezo.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/e993f56efb6f23497a0d3c8ead4a7ca4/rarawufidekuw.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/14228621919.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/31323591757.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-17/images/files/27440626607.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/nadifamoguxovalalutom.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/kakelelajikaxozuxow.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/1039128711.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/80356865661.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614118f452b08---girifiliperazesifoje.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/xubabelevabixemojikimu.pdfIn PDF document text
    • https://kopari.hu/files/file/15022376513.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393a1d2317f---penil.pdfIn PDF document text
    • https://digireg.si/upload/80884333867.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=best+camera+app+note+20+ultraPDF 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_off0000e854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE854 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001006b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006B 10836 bytes
SHA-256: 18d4f77ea6707810d6e3a22d33460d51703396c2383016e9191993d2a27e6ff3

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