Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb4ed16e1ff6392…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 00:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3f5b44922dc63aac6550e31c5959e491 SHA-1: 47e4b9bb2557e6bca3282ce71e6916910c7fc04d SHA-256: 1eb4ed16e1ff6392703e2e41b1657e20d7d5b0f5d418cd81738337ca22f4dfa3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to external sites, including compromised WordPress uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious or compromised sites. The structure suggests a link farm designed for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://gotween.com/userfiles/file///norasibi.pdf In PDF document text
    • http://www.tramag.pl/upload/file/bixomisenasovozugarav.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210612093456393.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d39695825ed---91107279651.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/vaxidutupupetakajivi.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210804_E317DBC38CBFC089.pdfIn PDF document text
    • https://nexusmediation.nl/files/40105065980.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/727905985.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9699786ba9---kupago.pdfIn PDF document text
    • http://falconltd.pl/cache/file/84694023299.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/65a6c3f1ced75cb62a87a474b41c649b/nivuguwuwujexetafi.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/79355466807.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/62316096719.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16119ddc422a92---julalivodekuwuzi.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609faaa2c5050---wupifidumito.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/nezagesutuladujusebodu.pdfIn PDF document text
    • https://tsolisp.com/files/file/fimuzikizorevoxamas.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/winix.pdfIn PDF document text
    • http://gapp.fr/medias/files/zukaput.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16125b06a5c5d7---tanimi.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/vifuparogipuna.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b11676a8b---36511884137.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/d00a943491411cae244b02a335b415db/38640635903.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/98966639773.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=xylophone+sheet+music+pdfPDF 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

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_off0000d45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45B 10844 bytes
SHA-256: 2a1d615d73ede5dc0d93ceab54d0ba2671a9eda9b15e9d8bcd8eaac690753da5
font_01_sfnt_off0000ed34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 17180 bytes
SHA-256: 0c77d90cc1b974e884daf2914d5805c1472161246b7b977eb7d28280734d81cb

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