Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec43dbf095572140…

MALICIOUS

PDF

76.8 KB Created: 2021-10-04 16:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6c8e9e61dbe21079c4311cebcceca8e1 SHA-1: 69b689dd34ccca0c988014034ed28c0171f453ea SHA-256: ec43dbf09557214058c2dd7e9a1ee35c80a22da37270f39169f1b10796407d7b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to compromised CMS upload storage and disposable hosting, indicating an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=tongue+river+reservoir+state+park PDF link annotation
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613358110af59---zavobuwil.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/bowuturalesa.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/46671638935.pdfIn PDF document text
    • http://dichthuatanhduy.com/uploads/userfiles/file/44245075185.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/2571716823.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/36692307404.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161502cca1c61f---judixe.pdfIn PDF document text
    • https://matrixx.lu/images/96053303217.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/63414739333.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/46496015143.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/rosuvuxegironeg.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210926100415.pdfIn PDF document text
    • http://profiklub.sanswiss.cz/files/file/87714658773.pdfIn PDF document text
    • http://www.moyekolodin.com/files/tejalefalodowibafoler.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/tajirojukowe.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/21580771394.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/93958114547.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/88591349400.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614141bc15a34---40002741465.pdfIn PDF document text
    • http://sweed-trans.eu/ckfinder/userfiles/files/37188724986.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/42235531270.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/4be59630513da44438ee5262503db6c9/38897909120.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/95849143534.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/jobepes.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_off0000c3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C5 10604 bytes
SHA-256: f1be767189a4336944db4a676d191cb2cb9627f701a8f6a587b1689e036d0f6e
font_01_sfnt_off0000dc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 18836 bytes
SHA-256: 1eef1be345382936f7e7ab33f60bb092416901679833246b281f83f94047c39c
font_02_sfnt_off00010d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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