Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9dab6c8d805a5c…

MALICIOUS

PDF

241.3 KB Created: 2021-06-30 18:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 0dae69b75297813b123354c4b2fca544 SHA-1: 7da54d95c6acf8ce16284635ad1d34b4541e24d8 SHA-256: dd9dab6c8d805a5cabbacb5359785e4b3962513515c8db89c0ddcf66da065070
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to lure users to malicious content. The presence of external URIs and a link farm indicates a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8878

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://sjalikave.hu/pictures/file/dutuxu.pdf In PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f1b65d184---fedumiletuz.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/he9jou30flm25ri9etejrtph15/kedufuk.pdfIn PDF document text
    • https://visualarchive.bg/files/guzuwawivedu.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c83e04d43---xozokaxekiwelapopezum.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/zikibesadasozefolodarasa.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/otsi2ir2omog3vsvenai07t0u1/komurikexibesagobivupuf.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/12deeddad21bdcf9d4ae9adaaeee0b2b/75946305854.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/jaromifok.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/a47bda752de6c63d492be56f33a4b37c/tovokizuxitikig.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/6pq9u01970k9d8gedqtufndhqd/59440294449.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb2d4067f0---53972908202.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/ijri68pk90tp867scdp5h36vbv/58751145724.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/cttqsj0ft2t6jouahkef8tug9l/fedole.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/21599294403.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/mizizet.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/c1b1f76d80b82a0d20be2fe7299d7f0f/35310805713.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607870b3a3849---jedutakuxapitowidugosawob.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/14a04e5a15a264805b7383bd62444ed6/gonuloxi.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb60e195807---36683450546.pdfIn PDF document text
    • https://emmaushuis.org/pages/46017238545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=blue+yeti+connect+to+iphonePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C191 16160 bytes
SHA-256: 7930690cc52a2a5fbe7405edd13db551ca9e961f325f38d9f744c7e1371af257
font_01_sfnt_off0001d733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D733 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ef4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF4A 10308 bytes
SHA-256: a83d06966128c96fe2182f530488f78d07c4026496d7ba63238c76d524f41f85
font_03_sfnt_off00020678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20678 156020 bytes
SHA-256: d5c1f78540fabbe23d361a3f1c9980930ec6c5d5360cec49f7ffa18252ba6ae3
font_04_sfnt_off0003820f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3820F 19528 bytes
SHA-256: 682a4e6a08e1580f7192b2b70fb1085f5c8fe0f5c4ab6f183c9b20721f3c8a27