Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0e5c179af2d127…

MALICIOUS

PDF

120.3 KB Created: 2021-09-07 21:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c51d489e5464b3743223a7702ed9ad61 SHA-1: 71609d8605ce8c219b83b2c8c9fbd4be7daf8384 SHA-256: 4c0e5c179af2d127c101d86c64f8495d07113acd6b8c1cdd883d59d291dcba08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bscsaoner.in/ckfinder/userfiles/files/20125230462.pdf In PDF document text
    • https://clearpatth.com/userfiles/file/37460561670.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ded8a62ed---85214280532.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/83858905006.pdfIn PDF document text
    • http://melabo.com/upload/files/2767399614.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/sixivovemutebuma.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/640703042.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/26828271501.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/7f354d2442335cc235351e9efe6c56e6/41726662307.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210824_152657.pdfIn PDF document text
    • http://lottfamilyreunion.com/clients/878857/File/92464716300.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609d35296e475---77886289258.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090766a72c58---lodewevosimorulug.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/cea75569758a0bdeb42ca437f633d631/vejogazugo.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/12615202756.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/87507616543.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f88f9d71fa---36605982635.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/vekuzosi.pdfIn PDF document text
    • https://grup-rul.ro/printuri-fi/files/45318244229.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/30951838150.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/sekimafopisax.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202108292051243399.pdfIn PDF document text
    • http://meta-min.com/files/wamidojifovu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc658084d6---35223655035.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=usain+bolt+biografia+pdfPDF 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_off00016e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E31 10688 bytes
SHA-256: 5e634d390b50cd57d85301e4ba5b48fef83820ba850213121081226078671790
font_01_sfnt_off00018658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18658 19604 bytes
SHA-256: 9eac7987dde761e53c00d8c3c554a542b09546d0f78ce007a74d470ca285a04b
font_02_sfnt_off0001b963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B963 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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