Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62c411841800eba…

MALICIOUS

PDF

84.9 KB Created: 2021-09-16 19:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 542703e8d536d2eef5de0c27d51b0485 SHA-1: becbc4d9d6e734dba45947226ae88239bad8f26a SHA-256: e62c411841800eba1f9743dff6a2135bb5ea7f1ef7eb75d5055336bf70785d2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of embedded URLs and the nature of the links indicate an attempt to redirect users to malicious content.

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 https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rl946jvsql693jjnhvf0n743q3/bimularabipuvebufenenux.pdf In PDF document text
    • http://www.farmaciapenil.es/userfiles/files/53214017287.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/99222900971.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a725fd1629---fupazopi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/vaxinubixawi.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/84197319119.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/97208401852.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/pagowitarikoxowofilepuvi.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/50121820939.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/6742982323.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/redexotogozep.pdfIn PDF document text
    • http://holzbau-napetschnig.at/48548940378.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/fegejufudewexulijodadotak.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/92607359758.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422555302ea---wasulinimodimagosatunega.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/88038163270.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/61649473113.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/1qn2r9do8hm605a40412t2c0oq/70544915860.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/4422946571.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/85338291596.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/mosepiz.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/xotodufaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=como+hackear+el+whatsapp+de+otra+persona+desde+mi+iphonePDF 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_off0000e100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE100 10988 bytes
SHA-256: cf38573493f461a94c933b47322284eb78bdbb448a471c865465ad35ae390a11
font_01_sfnt_off0000fa70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11282 19208 bytes
SHA-256: 6529163cde97be76957965fb39eda39b2b38ada38f519acc207460780e34e59a