Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d675f4b29c43ad4…

MALICIOUS

PDF

83.3 KB Created: 2021-06-28 04:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8b35a2ab1e6e11bcba501ab29c5b7259 SHA-1: dd72674923f53b046436a6137581ac6cf063b029 SHA-256: 3d675f4b29c43ad4de13f5f7c2f75462b59de522961b744bac575110a17d7995
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://oniceh.ru/uplcv?utm_term=significant+figures+and+scientific+notation+calculator PDF link annotation
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/18487024045.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/7236712960.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/punivuwoxipefopalosaxira.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/rofuvukiwap.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c9345c209ea---76952997421.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/7656480937428762d782bf83feaeaf47/dibupav.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/dujaruvusivometemapibad.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae03be3b2c---komapijanukagugasunote.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/99336270019.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/wogeki.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/25314284915.pdfIn PDF document text
    • http://ubest.ru/images/file/30381866650.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/0qhi8m490d2g5r49cvvhs97hic/41180511719.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/665547747.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/garujuputi.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160af80aad4c31---zirinifajoxubagizasuwa.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ggk3kscuuenmpcjtkflv1mqbiv/72729786296.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/8031498787.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae9f297e2f---28537279771.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ff59380b2---loberarufedotekavatozanav.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/lumajud.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D2 16636 bytes
SHA-256: 6ca411425d56ad2d058eac6419eb23dee99cdd650ebef3563c72bc983d4d8cf8
font_01_sfnt_off00010edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F2 10824 bytes
SHA-256: 51f56f09f520673d1aa35eb20549969fbc386854af0340b59966a7b8617c0f97

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