Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2950a28c335833…

MALICIOUS

PDF

80.8 KB Created: 2021-09-09 10:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ac70b61c6471f560da7fce3aafe11200 SHA-1: 2ac48f66e00fa0ae012a6d5f12626a6d904538ab SHA-256: 9a2950a28c335833a39f0baf76e7e49809f4d62b1873001b34d56961db24aec5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is designed as a link farm, likely to obscure the true malicious intent and distribute links to various potentially harmful files, such as the one hosted on izharfoster.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133df641bbca---34312682578.pdf In PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/16148202021.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/34883138553.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/safekixexupuxez.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/lovan.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/kibamobepepajoka.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/33610482537.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/82976800516.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/92835766101.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/65369601062.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/xudagakusipowozewikajudiz.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/20454783520.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/tukoxolewu.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/87f83d67d047e677a5d578c6e0719cd8/zedivaxaxofaxek.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/lulotitetumiba.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/62916899622.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/xijelanagurexusimod.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/19921895672.pdfIn PDF document text
    • http://skisun.it/userfiles/files/wirizudifesonoxezawa.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/wanesekuletimozaxojalod.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/41506779036.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/xiwajunefoxaruwimepar.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/soxapoxuvazurikig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=farming+simulator+2016+mod+apk+downloadPDF 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_off0000c9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE202 11320 bytes
SHA-256: 3f24b4cb2ee49be1df19dee3204af1618e97e125e834083ab2c8e708216d5240
font_02_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 22916 bytes
SHA-256: e1e624f13eeb667ed2aad63076401f4f32956c48ba9c4be27dedb9c853542bae

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