Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f8b48400b1d865…

MALICIOUS

PDF

74.0 KB Created: 2021-06-20 13:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: afb672882c02fd23ec4ebc7ca17d5517 SHA-1: c9f6af35e7f5939531fe5be0a4607110dfe8272f SHA-256: d2f8b48400b1d865c79220ec5f411e1b4a3d3c4eaafa343312ed804fe9dfb253
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160736250aaeda---lebolebafivejolefe.pdf In PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/lepoxiroxibanajasefike.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/kumh9jpnq5rcgmricojb2ou55g/jigaduxenufikifo.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/689js10n8ama98q9s18n6vrid9/42780601861.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/pumofixogesurazeno.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087203b502f6---32677691809.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/40655701476.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/kb61e32fsece5vf9lmtqblbq5c/856537373.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/92724342208.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/wobuvukasonej.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160840783e7ca6---gemif.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/fq2er4s62h6t9obet4cqu1da80/83789330324.pdfIn PDF document text
    • https://ekransamara.ru/files/zexemabamoferaxatizanukep.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/lalakesix.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/6fcb8c3498d081488e156e2f068594d8/wumemoponekefewudumuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=unlockables+re2+remakePDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC1 5272 bytes
SHA-256: ae301498b9feb5c0dc9d35279aa766adaa3ab90fcd22e5651be5c8d56b2f114c
font_01_sfnt_off0000f199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF199 12632 bytes
SHA-256: 8f17a5270ad82d15866ca504e84c0036607e7301f49c9ad5236cd660c9eb07cd

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