Malicious PDF — malware analysis report

Static analysis result for SHA-256 25cfef5beddcb532…

MALICIOUS

PDF

89.3 KB Created: 2021-07-30 11:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f39f1e8b591b8efcc8f6735c0e340bfb SHA-1: e1f304c61a494ca840b3b315cb98495005a2c16f SHA-256: 25cfef5beddcb5322666d85c42e2a45d6c5f102fb48f310f9f15f0a711759050
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms and utilize SEO poisoning tactics to lure users with popular search terms. The presence of a 'download button' heuristic further suggests a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent, likely to deliver a secondary payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=despicable+me+1+full+movie+tamil+dubbed+download+tamilrockers PDF link annotation
    • https://vibangthuaphatlai.net/uploads/files/watigilorera.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/7c440e0e837c2e7db827df0f5cc10ba1/4890989097.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/08e96cfce92cdaadd26a83ea6b857b50/suzabowop.pdfIn PDF document text
    • http://fotossc.pl/_files/file/rolunakijiwamiwe.pdfIn PDF document text
    • https://jagominum.com/contents//files/57743912157.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/3cd97cfa79211dc8189b4054fbe00514/lejevemewaledaz.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/87176170719.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/19796572314.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ac233b7544f624fd984f5c44588f6467/11239876283.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/sojuguni.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/43583526519.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/zepojelozog.pdfIn PDF document text
    • http://msiutilities.biz/documents/gevobamufuz.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740b84dd7f9---naweralowuwikazukoruvinen.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/ap491elq7sj9pcd05mhptg0735/kedafimeriwivavewape.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d9ee2d5f8bbf8c95e2386a327e6d0cc2/66693655345.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161026508c3b0e---bijeditawinexukobanuwi.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f4cd9a16d---suduraz.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d33b6e9aeeddd6406e5c1c4d77e37f5b/guniguvevunabuzesexuwe.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/pinibazipuzoromuzivos.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/70930275616.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088030cb5573---54161657926.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/b02773fad1c94ed7e1b6811f90314886/22587342616.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8d42fcfdd4---39955729543.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_off0000f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 16920 bytes
SHA-256: e38081e4a5a2d3524813d9ee211ee83d2bbcd021cc70b0367a7ad4e52d1efdbb
font_01_sfnt_off000123c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C1 11316 bytes
SHA-256: 969e7c6d15f8767b42f1ddb66446989d4e34ab9bc8251783bf4b1e0a32e6caa5
font_02_sfnt_off00013e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.