Malicious PDF — malware analysis report

Static analysis result for SHA-256 59296070cf9ad6d4…

MALICIOUS

PDF

89.0 KB Created: 2021-09-09 04:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 36f9c2dbd0e3427fd556ed9276858689 SHA-1: 1b57e3e073c56c5130adf1055144202994b6cae5 SHA-256: 59296070cf9ad6d456f107642a67eab3819526108359eb1d69c20b59ebbb9f93
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a heuristic firing for PDF_SEO_DISPOSABLE_LINK_FARM indicates a large number of external links, many pointing to potentially disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware download sites. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

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://preiss.at/upload_files/files/sawomolexitowad.pdf In PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137281472bbc---labikizifubaguzebax.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/tititirekezofanakofukewi.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/gebukimomi.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/pinenulekadonunovi.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/gazeduxupakexosaxu.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/fozew.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/somomakudapeteruwedi.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/tesolani.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/kabofuvumonidad.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/lanitawinojenabujesupidi.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/10577218608.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/87180911931.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/jarabogopori.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/tizogigevitexivawu.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/33643159950.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/digesolizixiko.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/suvonetesojukuwuga.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/lozimemudu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa87de94bf---73221375733.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/pavokubiluwejuxex.pdfIn PDF document text
    • https://dalba.net/other_files/File/345394747.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/jafugajobakiniwusuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=dragon+ball+super+broly+movie+free+english+dubPDF 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_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 11268 bytes
SHA-256: 33fb77d74cc447c5f0a415ce747f076bace00d737a826b7cbc069bad38130720
font_02_sfnt_off0001225d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225D 19900 bytes
SHA-256: d6fd2091ef9ca1d0d9290ac570e2d6db245552532ffe1aa8539ede392e1b934a