Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29060d97bcd974c…

MALICIOUS

PDF

75.1 KB Created: 2021-09-20 09:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b2f6cf3194b4e41d2b50fc932e931699 SHA-1: ec797d3ae3a44fd5108206f1921a9fbd5658791c SHA-256: f29060d97bcd974c33689363dfc5ec63d273e79e2adf53eeeb83b9a70ce8389d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple domains, including compromised WordPress sites, suggesting an attempt to obscure the final destination or leverage existing compromises. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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://allytemp.ru/uplcv?utm_term=italic+font+keyboard+for+android PDF link annotation
    • http://tyextractor.com/d/files/pateri.pdfIn PDF document text
    • http://www.llmhospital.com/www/js/ckfinder/userfiles/files/jesozagimelel.pdfIn PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/37013045882.pdfIn PDF document text
    • http://ozona.pt/js/fckeditor/editor/filemanager/connectors/wysiwygfiles/file/22789976292.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/gokasitemavusuti.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/zufidejopijeva.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d46fb5d00---vuzikisuzatewa.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/piloxitabovebefopipew.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/78101956306.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143922997be9---88060790763.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/6781441020.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/silaworagezofebukugujet.pdfIn PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/givejenev.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/82856316167.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4a723514c---16026066253.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/pexulebiku.pdfIn PDF document text
    • https://tierlistei.ch/downloads/xesavagove.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/66763248883.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/04539214f977130f07ac5d80f7d25997/vajidixorapupev.pdfIn PDF document text
    • https://tmtteks.com/files/50551345770.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/94688271870.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_off0000bef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF3 18376 bytes
SHA-256: 26361619d6afed5d4ed71b6246b9a65578618d1ca1b9208e7c6d7f6919bc96e1
font_01_sfnt_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 10596 bytes
SHA-256: 9a2a7558099d2682ea31eed51c5332cc41dbd2c9af39e0ef6f4786f5862eacd0
font_02_sfnt_off000106c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1