Malicious PDF — malware analysis report

Static analysis result for SHA-256 f497330be9f995db…

MALICIOUS

PDF

77.8 KB Created: 2021-09-07 00:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 22524904c98940ef7100cbae913255c5 SHA-1: 2e67139b371658dab131912692520cf4c41806fe SHA-256: f497330be9f995dbdf5b6dd4f144ca8c57041e139af513453bf9fb26fda80da5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded links, many pointing to external websites, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/285a46b4b49de77a3f2d99f151fe3ef2/34755890682.pdf In PDF document text
    • http://stalmost.pl/userfiles/file/kosubalubizoluf.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/12049818848.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/batekora.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/lojomijirot.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/71433627281.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/6da4fa5f09b453fb72f1ef58cd3238bc/senakikutuvifugibupixa.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/32854054242.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/biman.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f996297651---domokoladisan.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/aa0de0c7dca3cef824889bf43882a092/nosunibepunewopepej.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/48418820366.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/72969008115.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/84604276375.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/92636603588.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/37988259940.pdfIn PDF document text
    • https://tmtteks.com/files/wupef.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/241c12bb035f22d0209c2be03e815878/82173245701.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/64880073720.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/1672740190.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/ea64e3511626ceacadcc6d45b1e9d6b0/lifujejebi.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/jk4md67qk9hjeoteeuug88b7ch/40670840127.pdfIn PDF document text
    • http://parkwaywest1974.com/clients/861606/File/dowuwoxerosadifujilifokir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ordinal+numbers+1+to+100+worksheetPDF 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_off0000c9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D0 17424 bytes
SHA-256: 1709bd74c043ef10c0f199d073c43fbc2a82f005eced8f3bed8a38369bb008e1
font_02_sfnt_off00010e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E45 11128 bytes
SHA-256: e61273e101307f944022d641d96e2a99694fc232d6a3b7fb5fe98f5641d6bdf0

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