Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fa741d90805f31…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 00:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c42cff39f902bcf06c55a2298caa9aa0 SHA-1: e7af2f92d4bfb3041086bc559f0bb4206071116d SHA-256: 07fa741d90805f31ca47fef167ada8b5a9bc4f8404284f8197edc3f4fdf6e297
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The embedded JavaScript likely facilitates the redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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
  • 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://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/3eb255bcd03f6f13858aecfd0f37c707/6658957579.pdf In PDF document text
    • https://aquatrustfina.com/userfiles/file/pitedurasuvujalegi.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/dexigisune.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/17888259257.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/tokugiworamekewif.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/jisazujudemekaguzuto.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/48744468588.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf99ebb93ce---lifofakumewokebibumogegi.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161137fd330242---zesopexiguletedoluzi.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/91230996071.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/5d5b34fe2b1e6ffb15ec00dbe75d5608/36040065973.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/43071139324.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/44777325625.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/zelaf.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6836ccabb3---40566351966.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/baguwoluwiruwokub.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/fabowelozarumiki.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d7e7761238e0dbebcaa3247054a4a537/84903108074.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/62514790299.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0e4f66d2e---pimutovinimakuri.pdfIn PDF document text
    • https://cpc-serbia.org/js//files/tadewuremamujovexikaso.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/77791712601.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/in4efk9v9adojcahjkon0dgdu3/86733684745.pdfIn PDF document text
    • https://ptogel2.com/contents//files/17019175475.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/difiwoxuvuzifosenirewon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=heat+energy+worksheet+4th+gradePDF 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_off0000d35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35A 18324 bytes
SHA-256: fcc67961a7f9b52062ea98dea85d1646b8700134e9de37c3ee8474ef0378f757
font_01_sfnt_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 10748 bytes
SHA-256: 54b0a5e13292fc63718a75460a2812068bc9a84f033023f694c7e74309c5b724