Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b43e03fae5122b…

MALICIOUS

PDF

203.6 KB Created: 2021-07-27 15:37:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 11ea3e4d9c9a97fbb0f17564c29b473a SHA-1: 6b12326f2da801f1270fb05550a618b822847771 SHA-256: 97b43e03fae5122b37ca6d414bde03f59c38d965d4174c0e74d53535f138f146
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, including one pointing to a compromised WordPress upload directory, which likely serves as a lure to download a secondary malicious payload. The document's structure and embedded links suggest a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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.
  • 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://newdimension.su/userfiles/file/mifisujegutuneduxomewil.pdf In PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2e0050239---24010593196.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/54444317141.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/kiwesevupafenasas.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/0301475bc18001c526211c2e8b9692f3/31215495860.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/23556883119.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64618320551.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/72576910104.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/xolefepubofigin.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/19607712063.pdfIn PDF document text
    • https://recrut.com/files/files/limokemazapajomepewiko.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/nigaluwogovisejur.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/10434121237.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/0b83647552a4921e3194f30b72a0f314/jidesibezaken.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/dunadumiwunoxena.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/13598171221.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a2af8ea0866---pejaruzegamijijuzesak.pdfIn PDF document text
    • https://digireg.pl/upload/21526992374.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/nhgdcqkfmhf4lj8ove03063lrq/kituto.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a721a7cf072---58526455320.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/gexedozipez.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/1c7ba38edee4c27ce190cdee52ba83f5/18216428361.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/fdc6fd316b5047af696bc5c332910e35/kewetogamo.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/12403803600.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=what+is+the+modern+feminist+movementPDF 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_off0002bcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCAE 10632 bytes
SHA-256: 39c9766d669c96b6cc90d7a037639497eba409bd5afbee9fb6e04879a172cdb3
font_01_sfnt_off0002d4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D4E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECF8 20088 bytes
SHA-256: 322d938adf167490b9bf0f04c36dfbb651fd4ce916683dd8c33e8dc6ad7c1011