Malicious PDF — malware analysis report

Static analysis result for SHA-256 db38bcae32d81ebb…

MALICIOUS

PDF

88.2 KB Created: 2021-10-10 09:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2939815b35a223b9bc2e44b7ff832f13 SHA-1: d4c74ce98ccce037a1e97841d0d81c641b25647b SHA-256: db38bcae32d81ebb1f47b0dc595cb89d394596c78888191fa57c3ee052048ea6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of external links, suggesting a phishing or spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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 http://domesticsolutionsagency.com/userfiles/file/xoxezokituvigununogale.pdf In PDF document text
    • http://etepi.pt/js/ckfinder/userfiles/files/87339465305.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-10-2/20211002221238121497.pdfIn PDF document text
    • https://renetravel.ro/images/files/tufow.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/88771b0ecce22300e48fde8cf7a7bcdc/47768015163.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/90491931735.pdfIn PDF document text
    • https://porfic.com/fotos/file/jujukiwixiz.pdfIn PDF document text
    • https://banifatemehmashhad.ir/userfiles/file/gubaruvudasafelixupol.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a2e8215aca---8736767375.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/46824479859.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/49651532657.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/55485541618.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/dosegiragupamo.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/16992590491.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/67398580658.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/31427605087.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/69141256616.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/91080888731.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/winagudise.pdfIn PDF document text
    • https://laps.pl/userfiles/file/30941413410.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/50330585501.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/60618636373.pdfIn PDF document text
    • http://theblare.com/image/upload/file/winivonolugivedaketor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=cos+20+in+fractionPDF 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_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 10424 bytes
SHA-256: 7cca4347900b2e0584aee6406e0145e66dc880833cd9c2a074f26a06072b9515
font_01_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 19980 bytes
SHA-256: af2aae3c3fc6e7e200ff13970d2ef6641dc72dad8e90ba6af00c02065143547f
font_02_sfnt_off00013af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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