Malicious PDF — malware analysis report

Static analysis result for SHA-256 0619e49938713f76…

MALICIOUS

PDF

80.4 KB Created: 2021-09-14 01:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 11e957888de7276c9a4930da52969e45 SHA-1: 91f54ee2201f5e9d893aedede827b5417cb729a1 SHA-256: 0619e49938713f763c9dedd2b26ab0ad5c7b4ee7e0f9f152a5ec656ce6e071df
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a high ML score and ClamAV detection, indicating malicious intent. It contains numerous embedded URLs, many of which point to potentially malicious domains, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links on disposable hosting, further supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://batiment-tunisie.com/userfiles/file/82001493512.pdf In PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/65360298989.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/gevagadedu.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/refaferunolo.pdfIn PDF document text
    • http://kiajihlava.cz/UserFiles/File/kinojor.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/namesimobagavukop.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/gewigudu.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/7305478496.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/58980550118.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/damijav.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/talepokevofur.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/98147553039.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ale29iifh52da471mei1ja5234/pitidurinobeje.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/xedapagojubavuzolu.pdfIn PDF document text
    • https://sharenkon.com/files/5182495591.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/15483526918.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/99418939260.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/7di70b2l8b6752874varqvnh3l/60834417534.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/xasutadapatazozep.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/65526000500.pdfIn PDF document text
    • https://majubesar.net/contents/files/15733867798.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/dalutiw.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba207a607c---zumitukafusixadewuz.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/09-08-04-44-15-10.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/jutafakigavatenojisula.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/34713943624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=old+snapchat+apkPDF 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_off0000d710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD710 17900 bytes
SHA-256: d52b3cb04a0ff4b56886f3923564f4acf06319dc03e773c0d7aed6915d2a557c
font_01_sfnt_off000104de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF5 10284 bytes
SHA-256: 542217d294e8b93a6e75ac40dc820a9aedd7a8498b386c7d42663b21da53c5c8