Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5270aadf726447…

MALICIOUS

PDF

84.7 KB Created: 2021-07-26 21:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a293bf5b0148f4b38b66e0556f1814cd SHA-1: 736984cbb5f86a5e345a4b314b5d13469e70e120 SHA-256: ed5270aadf7264479c0744938d09999f5e789d1fd8403cefe0ddab008df3bd2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many hosted on compromised CMS upload directories or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rauvuonsach.com/images/uploads/files/zenepezuruzilapebadepuw.pdf In PDF document text
    • https://clinicscrm.com/img/files/21291901519.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/cf60bef38a7f2a70dda8b1abb5eac86f/xonow.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/zixomenanosuges.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/ruxof.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/19293640941.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd68dd2d45---zidepujukezodaluwov.pdfIn PDF document text
    • https://kildevangen.dk/files/26624603424.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af3c316abd---jasoberoripijepotit.pdfIn PDF document text
    • http://hoskinspugs.net/clients/40498/File/tejadolamazatesijege.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d25a78980---45862271361.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/fimamebebibiruzafonufen.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab85aadd0b---73358843058.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/88692857303.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160acb4b8bb7aa---99980162300.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083624eb1051---nafalugezovivagimazi.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/bogofijiniloraxupaz.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160fac8bcf0241---fozojezeworoje.pdfIn PDF document text
    • http://ciskmv.com/css/file/78890809522.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609150963213a---78395816241.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/9174e8d5e42108bb979cfae8478304af/mafazuvidexeso.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/titabiditesebizakelupete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=positive+words+that+start+with+the+letter+aPDF 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_off0000e794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 16860 bytes
SHA-256: e6f6d2d031986eac558e724d4c744a3b009c417d9e564a1b7dbd9f5b52301b45
font_02_sfnt_off00012b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B79 10392 bytes
SHA-256: 29b53df47f9cc6edba61be9c789488395feef80b57bf614f0d78082c880ab3f7

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