Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e9b9ffd19ab3fd…

MALICIOUS

PDF

85.3 KB Created: 2021-09-23 10:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9031b45be60a541ca3358ee5788b7be5 SHA-1: 6831b41729aed7605dd2d318442e61970b925983 SHA-256: c0e9b9ffd19ab3fdf5b62835555d00620b30ddee9051f541d2fdd7168f64cd8e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The presence of PRC/3D content and ML classification further support its malicious nature. The primary goal appears to be directing users to malicious URLs disguised as legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • PRC/3D content in PDF high CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=watch+cherry+tom+holland+online+free PDF link annotation
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139469bd5e25---79779597383.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/51033210764.pdfIn PDF document text
    • https://spyboarcams.com/files/96738037709.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/61844189904.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/wimopemudaronig.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/16654506450.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/7031000192.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/161479c6c1ca4b---baluxabedujemi.pdfIn PDF document text
    • http://secoinblock.com/upload/files/zakufukixufa.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/mujunisok.pdfIn PDF document text
    • https://esvigo.com/upload/files/15322891916.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210913100834.pdfIn PDF document text
    • https://olterus.info/contents/files/5926605922.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/fagakuri.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210910_170029.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614090c8ec2d0---39999019452.pdfIn PDF document text
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/xinuvudajidof.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/lazenumakobatitakula.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613129c9bc5f4---77153024731.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/97660475951.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/sojikasodidusam.pdfIn PDF document text
    • https://priscar.com/documents/files/59587293290.pdfIn PDF document text
    • 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_off0000e5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DE 18964 bytes
SHA-256: 778f811376980262497f05984ae3b1ec6eb878d6007bd58194f17adc3cfebf1c
font_01_sfnt_off00011738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11738 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4F 10680 bytes
SHA-256: eb75a2bb0312d2532b9dffce800ae3bba235e4ae5e0f056b23dc8f29b41b3aaf

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