Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b14426a5116dc0a…

MALICIOUS

PDF

88.7 KB Created: 2021-09-17 04:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fbff50c6a30a6900ea4aea7e73ae1b29 SHA-1: b6b5155ec85527ed0920c036b5c33c92200f1a4a SHA-256: 2b14426a5116dc0a71803fc37e06961375eeebe0f701b0e1ad666f1997376782
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous external URIs pointing to potentially malicious domains. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://smidgel.ru/uplcv?utm_term=kissing+booth+2+stream PDF link annotation
    • http://csc-0898.com/userfiles/file/20210901170532_vc3o92.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/3475470027.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/bosipanidapewiva.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/dikekisuzaradi.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/87388577934.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/vorakewok.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/6bae306661f077d4ef7779d0ad6c79d2/43014009135.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/84639965540.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/tamixesinozakof.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/koresetinozuberix.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161424d1c02b8a---39097245692.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/dagurozetoranomibuzulubim.pdfIn PDF document text
    • http://coumert.com/images/file/23343168146.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/lajigupivenuj.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/xoradupivumes.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/jofumedelegib.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/82462880001.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/53324075080.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/feroliliridonezi.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/65843841132.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/40620934710.pdfIn PDF document text
    • https://china-glass-mosaic.vegner.com/userfiles/files/20210903_132355.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/60069795117.pdfIn PDF document text
    • http://tulga.ru/editor/files/59131595465.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/pumakadivanatikumeje.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_off0000f24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 10760 bytes
SHA-256: 6e316ac59aa004661f3740efedb280c37307c1180700a56872cef51c148b478d
font_01_sfnt_off00010ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE9 19272 bytes
SHA-256: 4fe9899dec50ecfb136f7c23657e4b94e58c35ce8e2c1c2f1e1b1f0a7b55f58f
font_02_sfnt_off00013d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1