Malicious PDF — malware analysis report

Static analysis result for SHA-256 561977c7e3d223be…

MALICIOUS

PDF

86.7 KB Created: 2021-06-13 11:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78ca5f382a956b7f3a2153b73f7103de SHA-1: fbe7deea6376650f6067f581a337ad80bf1e11d3 SHA-256: 561977c7e3d223be959875f0abfda3f0f6fb538893ca784523fcb88de5c2c2b4
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

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 https://allytemp.ru/uplcv?utm_term=selenium+tutorial+with+java
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1698e4501bdc9720ea2608c04cff1f47/27176996649.pdf
    • http://tilestone-pools.com/i/File/kuwariben.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fdf69cf93---27351341144.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac69d87311---jurujemuwipegam.pdf
    • https://ivanda-commerce.hr/userfiles/file/30254579452.pdf
    • https://lawina-radom.pl/files/file/19415155445.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/25f700e585a6de42bb85e420934a6750/sugedotuvoguwag.pdf
    • https://zapcdn.space/web/img/podborky/files/rikawokuzudapo.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7d1031248---zafudipekimutixaxedosiwa.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089f2cb0375f---93458412522.pdf
    • https://rezgame.com/calisma2/files/uploads/85464198470.pdf
    • http://gemculture.com/userfiles/file/fapagutufobajam.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6aa03466d0d88f62deacbf0b0f3c4a0a/josajinorixufez.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091be7c93432---76202586921.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/19ee8d9f74a13e9ca1ce87f93d373146/bafabewefarawulejow.pdf
    • http://porpora.info/imagenes/imagenes_contenidos/%5C/xekava.pdf
    • http://agcslohian.com/userfiles/file/96109299511.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/57adc92958d224a31f60a77bb1c5a27e/rubovotafitadigifevekuvi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001139b.bin
1b1096b246542974841d0c0f6b630d33c41d3c397dcc797aa312579fb0157515		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 5080 bytes
font_01_sfnt_off000124cc.bin
5d69c0f46aa3bd127cabd56809fa22546db1f7eeeafa1f480b64997313350886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124CC 11676 bytes

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