Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8d31548c387ddd…

MALICIOUS

PDF

261.6 KB Created: 2022-02-01 17:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 8d85eea7ec6ed3c70dd233d3f0b85f4e SHA-1: 30522d25e3d84684108fdb9c073135cd319d4611 SHA-256: aa8d31548c387ddd226202a534e56deebcc9d6b73e63a44c5c57d07a2f9d9afe
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8135

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://mifuj.co.za/XSRYdR1H?utm_term=bts+answer+lyrics+color+coded PDF link annotation
    • https://nikosdimos.gr/userfiles/file/weluzadugival.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/mowulolevuzo.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1617c428f32ebf---30366049483.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/96780882809.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/94322491529.pdfIn PDF document text
    • http://xn--80aaa6aachkjln0qra.xn--p1ai/ckfinder/userfiles/files/pozizuguzinefevobebilu.pdfIn PDF document text
    • http://poiskvod.ru/images/file/wupufuw.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/tezibinapegid.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/33649662138.pdfIn PDF document text
    • http://bakoca.hu/files/file/vusokodapibi.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/97692277643.pdfIn PDF document text
    • http://indecomavo.pl/userimg/inc/92368391957.pdfIn PDF document text
    • http://stjohnslab.com/kcfinder/upload/files/wabavabibuve.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210829_34B45A79F2269545.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/tisazasisasumovuturid.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/22064882210.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/wixexeni.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/a9a89cef69d8bc25a999aecc4abe1bac/savikumugarame.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16171486d243b4---26313967151.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/wugijudaxezedowomerexiwup.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00039d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39D53 3056 bytes
SHA-256: d86cf13a14afba5ad8df92ef84d13b82c313ab646eacfdf277de5136511b105f
font_01_sfnt_off0003a9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A9CA 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0003c0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C0EA 10616 bytes
SHA-256: cf2c9ff5904e6e0069d48fc2e187498aa6b2030f4bb86e23be9cc64d8c0ca103
font_03_sfnt_off0003d96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D96C 17056 bytes
SHA-256: 03c8a2c43b0435c18542206f15fbc4f384032a5bd427f62e6b55054e7ce5efd8

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