Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a42c009239e9b13…

MALICIOUS

PDF

67.4 KB Created: 2021-09-27 14:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 56e39c6dce7b62e9962e7306ffaaf7de SHA-1: 04984b23a1d36829805da16528245c3d1efdddf1 SHA-256: 9a42c009239e9b13a62ce20f92c22548e3276bf44fe2077627c96ee7a820701d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF sample was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm used for phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern, suggesting the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://infrive.ru/uplcv?utm_term=android+10+p PDF link annotation
    • http://hotelbelleepoque.bg/userfiles/file/75830135217.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/lugeradizikudo.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/lubabovunekuxipemasupom.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/kamuzob.pdfIn PDF document text
    • https://tadimtursu.com/image/files/sidufixutenomaxazavuvoxu.pdfIn PDF document text
    • http://grimastone.ru/files/nozunid.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/pifosobizewoza.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/40491967577.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/sofapipupeseni.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614b969747807---kifeluwofum.pdfIn PDF document text
    • https://aspirans.com/files/file/zidajaripidu.pdfIn PDF document text
    • https://podimercrm.com/img/files/nixokazaxatawuvigup.pdfIn PDF document text
    • https://2winit.com/Files/files/xeteritojukunimexepug.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d99497d544---vefomisadevulirixo.pdfIn PDF document text
    • https://webmenuplus.com/images/file/gikabe.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/xopabafuzulevopaxa.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/sezolisafuvaworuxaneseli.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/norumalenalusifinabixo.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202109030509408347.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/38194616472.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/46975584564.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_off0000abe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABE8 9932 bytes
SHA-256: 761a4f8b217c3c5c73175ba51395aa7849f3892ded0665ef792012dc754bfa6d
font_01_sfnt_off0000c1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D8 15460 bytes
SHA-256: 515e5fa500ed684133d85b1e5fa1a6a8c448ac94f2e54f64e08f0ce327b8a171
font_02_sfnt_off0000e8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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