Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02f976df890e9ec…

MALICIOUS

PDF

84.5 KB Created: 2021-09-21 03:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dc1cd639bcca828d43b700f5c03c44af SHA-1: 8c9eb03b2205b78e52de397737f710f560740e87 SHA-256: c02f976df890e9ecdce01a5835c142f655d6ea6504e48f3b19cc4bf76a87e8b5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a machine learning model and ClamAV, as malicious and a phishing attempt. It contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=subtitle+edit+app+for+android PDF link annotation
    • https://atrax.hr/files/bivam.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/3479844608.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/51787744266.pdfIn PDF document text
    • http://machin.kr/userData/board/file/85884559653.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/39522666242.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/36516089538.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/wikipalonebixobomugi.pdfIn PDF document text
    • https://advik.net/userfiles/file/siwulikegekovukebakus.pdfIn PDF document text
    • http://xn--42ci4cc0aric4a6dd7c5af9nef7sg.com/userfiles/files/xivemudewuxipad.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/97594778250.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/24644087853.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613829f7f21a5---84836485976.pdfIn PDF document text
    • http://abwrva.com/uploads/files/86106778277.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/daxefuzotowojizulovizop.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/90707995953.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/wovikesitujaz.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/dokovu.pdfIn PDF document text
    • http://xenangheli.vn/public/files/kosajanomozebaragoni.pdfIn PDF document text
    • http://anpo.vn/upload/files/69264522982.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46759295b---xegajizulevorulomomubabez.pdfIn PDF document text
    • https://sklepbonus.pl/userfiles/file/lugunajapetefewodoroniti.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/48235364193.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/danupefimenewebokezofazi.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/20103642185.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_off0000e6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 10640 bytes
SHA-256: b239450ca864e582489eb5bf71542fbddb7bd591f0030c8e9351a041a7fa3f22
font_02_sfnt_off00011717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11717 17504 bytes
SHA-256: c93f94b39bd1b56221291fcb737e4e4ea7a73287d1884d8c6a914b0ec2708df9