Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3133099378a6ca6…

MALICIOUS

PDF

77.6 KB Created: 2021-08-31 04:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: f564cde945a27e599ca54da957b507b2 SHA-1: 068a856e999530a0e0b89fbfd51c8b6da92cc3d9 SHA-256: d3133099378a6ca6afed1ffef70b73a8ccc28516f1bdc202feb7e7df6a680e7f
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous links, including those on disposable hosting, suggests an attempt to obscure the true destination or distribute malicious content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • 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://glotecgh.com/upload/editor/file/malaweruvemutaf.pdf In PDF document text
    • https://chp-travel.ir/data/file/88578311124.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/84402371104.pdfIn PDF document text
    • http://heizler.hu/files/file/69996281021.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021080822365999.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/48123200119.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/5392165cb197255cd61f61f6b7bd9ab6/60825248344.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51c5825f8d---muzabekigenitinixod.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/jaxugenovili.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/78401312223.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/sanef.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/17483616055.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/27780621071.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd6e60ec3c---69459797056.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac019dcc95---pilupefonosoluxisazu.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/fobuwasupevagu.pdfIn PDF document text
    • http://foodchemsino.com/d/files/fakodavaxenalajerofo.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d4da4842ab---mowoditijozetinur.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/5dbe6fa11a6edbac7b651c62a247b759/29787868901.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/2e8c6a8a563fbc1160e4707909016113/97361827968.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210726002544_1158063797.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/21808128698.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=solution+of+rs+aggarwal+class+8+mathsPDF 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_off0000cc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7A 11120 bytes
SHA-256: e23559a47f7a7a0c7c1b795146d9bfe5db5ded9a3e4c7848a52fd4dc3822dd1a
font_01_sfnt_off0000e64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 16680 bytes
SHA-256: dac6d60d7e815657531b01dc2623e7ad0d3cf05586c0ac19ba36c8acbd50d94c

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