Malicious PDF — malware analysis report

Static analysis result for SHA-256 303f6711c6d7c559…

MALICIOUS

PDF

75.1 KB Created: 2021-09-13 03:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 32282866ca05997e108812636fde1d85 SHA-1: 4a9e86decedaf07097d5fdf055f21256836a5941 SHA-256: 303f6711c6d7c559e8b9a48e6f1009e1845ac7bbb7e4b3d6ca75f9d7371754e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, one of which is associated with a suspicious file download. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359f71e6ee8---xudewanepi.pdf In PDF document text
    • https://lwim-ouargla.dz/ar/files/vufoferakuvawukoxazuk.pdfIn PDF document text
    • http://thevalleytrader.com/files/15704432264.pdfIn PDF document text
    • https://035620126.tw/upload/greenkitchen/files/47649971941.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/69057839997.pdfIn PDF document text
    • http://forti.in/userfiles/file/2868892627.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/ziwowa.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/mimexekobulapixawur.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/fugiveweluro.pdfIn PDF document text
    • https://digireg.at/upload/24910071674.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d43d413b50---56126653631.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/96853189228.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/40524636570.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/rovefamo.pdfIn PDF document text
    • http://coconut.hu/userfiles/file/82053478156.pdfIn PDF document text
    • https://szabolcsipeter.com/userfiles/file/kotenajudax.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/56124052521.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109111152203876.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/15409116127.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/75881912093.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/74681007365.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/3448946421.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/bokusufuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=wonder+woman+1984+torrentPDF 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_off0000c094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC094 17600 bytes
SHA-256: 0b0d337c9282543f737c03bc1b35c4feb0ff37b4578271e2afb5c74c7e981a92
font_01_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 10688 bytes
SHA-256: 533fb2322a0e878541aeb11b6efb193a046eaf03c62a734c807e95b7861945ed

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