Malicious PDF — malware analysis report

Static analysis result for SHA-256 129d7fcb5512fa39…

MALICIOUS

PDF

93.4 KB Created: 2021-07-23 19:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a5c5921091485c0044de732a682ad5d4 SHA-1: 1e9e2e2d221d90f0d331e6c37497b2db66bb429f SHA-256: 129d7fcb5512fa39b6be62ec04dc18b70f174959a94a7300080b4d7aa553ed70
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised WordPress upload storage and disposable hosting. The document body is heavily obfuscated and unreadable, suggesting it is designed to conceal its true purpose, which is likely to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfd8d1bdb7---selozij.pdf In PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/gcfga0ua2a2ev5lm3m8ol0kndg/nireruvugibovogo.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-8/20210508173529623342.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/6d6ecfabb4c453fcf8d46806811726ac/86831051860.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/44674294469.pdfIn PDF document text
    • https://stopserv.ru/files/file/taparezoxagota.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/zukarut.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e06dc47b219---koxenilurevudikifoju.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32c3bc4bc5---63234515431.pdfIn PDF document text
    • http://unsersohn.ch/images/file/1506147998.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1cf38dd08b522ad7f1b0cc97cc9a4f4e/36258934605.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609858662407c---10086274659.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/9ad3bbd416bb9d20681230aa3b421ce7/zulojaxekaxotegopozelopix.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/vemofarejatinafeka.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed018252f0---69954501771.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/3a521ae2a66a1f688c24b34b5854a77a/diwozazawunefilolofur.pdfIn PDF document text
    • http://sakem.org/userfiles/files/futatikibevuwaneneleb.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/9db9e75bb8ca6987b73214b2861ac048/14026432821.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/38317968484.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5137321c2---56903678867.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a780b2d9a1d---57727798611.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/42083772766.pdfIn PDF document text
    • http://udemadriatic.com/userfiles/files/dozetapewirasigoguno.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/58df59a364a8027f3f6bb2864ae766f1/lidalimog.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/tolinukakozivewuribovif.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/2535c00cd17747639c22381912732d47/29067765644.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=spider+man+drawing+sheetPDF 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_off0001098d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 10836 bytes
SHA-256: 540921ca3920ccfe284712b37518721cd237cf0f894ec87a6c0c62a1b6dc755e
font_01_sfnt_off0001222e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222E 17144 bytes
SHA-256: bb0abf3ce7d253e9fc7f538e5fbad17e2c7f43e7164b5c69ad53c04f050dc96b
font_02_sfnt_off00014f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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