Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e475e5549d2f130…

MALICIOUS

PDF

83.0 KB Created: 2021-09-18 10:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 772e397b8262ad69fec599df9d1d078d SHA-1: f9736e47491862b3861fcfa620952c7920ef6707 SHA-256: 0e475e5549d2f1300aa3a5097caccc7ceb8d1b9cf093c49746505fbe687a409d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://raegcafe.com/uploads/files/zuxinamuxivopez.pdf In PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/91376070574.pdfIn PDF document text
    • https://hsse.cl/files/61079838233.pdfIn PDF document text
    • http://bavlas.lt/ckfinder/userfiles/files/damirofenekagos.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/edda6f97e617d471e57b0e38313a3cad/sedox.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/49027862126.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/gutezudunusapodefud.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/vozomesuwazisilowapigadev.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/74349418939.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/10051471639.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/gukiworena.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/sekiwirisupube.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/kufifopadejumuju.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/xujomegoginizet.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/bijasexediz.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613813501351e---savob.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/vajidafobenivabugup.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/wofoweramefopibek.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/9109896893.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/88493462825.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/63438395567.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/jivoki.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/zotazudilidozoz.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/91323916298.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/ladigesefibuzawob.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/43893471951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=hellsing+manga+pdfPDF 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_off0000df0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 10516 bytes
SHA-256: 45919232d2f4c9c94ed4780a8a7a33123aefd46088841f3950f73200e8524bf0
font_01_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 18384 bytes
SHA-256: 6a180e71c5ebf2f422e4b2d86a118930a526fd51abfb3abb127edeee1a598403