Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14bb49f89c9ec52…

MALICIOUS

PDF

86.7 KB Created: 2021-09-24 09:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e9791a60e7b66c694b080c02b8689796 SHA-1: ac3911d49e6d3d8762451a9b509c18b98cc09db4 SHA-256: e14bb49f89c9ec522e774c2fb8d34f7c8370c22ab812a069c2be8d27574a97ec
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being part of a link farm designed to obscure malicious destinations. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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://ping-property.com/user_img/files/rikusodowupevelopevomo.pdf In PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/42653781391.pdfIn PDF document text
    • http://herve-coiffure.ci/files/52143676448.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/12948060050.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109151607409275.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/dizanepiluboxijidutafaje.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/57114292639.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/xonovevuvejikusuxif.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0676784bb---xakalutowi.pdfIn PDF document text
    • http://ergakiland.ru/files/files/286515984.pdfIn PDF document text
    • https://kocarbonag.com/luutru/files/zozujeboxile.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/63740396830.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/jazajemimuluto.pdfIn PDF document text
    • http://cistenivytahu.cz/upload/file/ludobuwemafega.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/katesurawelenivaxiwukefa.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/kufekerobazarazujobas.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/nurupowesanodafizipo.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/90620415307.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/10579346044.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/xibiraxipasatinev.pdfIn PDF document text
    • http://bergepkolcsonzo.hu/userfiles/file/manapogizogosuve.pdfIn PDF document text
    • http://aven.su/userfiles/file/wisupinosu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=hands+free+recording+snapchat+androidPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC24 18596 bytes
SHA-256: d26aa869a61c95fb4b0e6aa1492a6393080dd65717e357f013564ce7da9a9e78
font_01_sfnt_off00011c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001341d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 10844 bytes
SHA-256: 5be9cebfcb550f3c100bdcefb09aa520aab5d5427ccaf5cdeb440ca04df38bad

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