Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d076206aeacfaf6…

MALICIOUS

PDF

85.8 KB Created: 2021-10-05 00:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 877face09e3d65296dc69124f95aac97 SHA-1: 30d87778d3e7eb3698fa2aa8202871de3b0296a0 SHA-256: 9d076206aeacfaf6ff6e90ce78f2e9d4a92b35de0bd1a3db775db02563744494
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://catamma.ru/uplcv?utm_term=meaning+of+willy+nilly PDF link annotation
    • http://sushigonewildtogo.com/uploads/files/74036841241.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/70104838756.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/161486ec790608---wedaxaxuso.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/68750436432.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/27482593401.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/87425896996.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/fawaxizafomor.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/vefunodoludejoberumu.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/87925777862.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613894dfaa5cd---dabuketozemanivux.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202110021659133653.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210930153521.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/sefesatisizeduvot.pdfIn PDF document text
    • https://hssanesteban.cl/files/88735703048.pdfIn PDF document text
    • https://blokhol.com/upload/files/15800089900.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/14633932307.pdfIn PDF document text
    • https://lompatjauh.com/contents/files/32036037529.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///27981350909.pdfIn PDF document text
    • https://dukumanis.com/contents/files/25841077571.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/030200006355.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/26369681609.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/36666744665.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/gewukukadivazomeluved.pdfIn PDF document text
    • https://jobtiara.com/files/files/pimemewugobiwiz.pdfIn PDF document text
    • 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_off0000dc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 10216 bytes
SHA-256: b03dce0e34b81353e7b1eb891fa31dee31fc7a3c925ad207e84db5db4cde0bcb
font_02_sfnt_off00010bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC0 23660 bytes
SHA-256: a55eb2c0d479b5d810ad56a6dd89f83033f9d63f0c257fd329aecd9238e89942

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