Malicious PDF — malware analysis report

Static analysis result for SHA-256 335f049588016438…

MALICIOUS

PDF

80.2 KB Created: 2021-09-13 03:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 98c93676673700ec7062dcce19a0adf3 SHA-1: 6cc8ba9e8689f20d2332c41cb8e88e0b78b7457f SHA-256: 335f049588016438ce3149ff9eedfcece59b22400cd4e35521cf0e60eb12a038
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests a phishing or malware distribution campaign. The embedded URLs likely lead to further stages of the attack, such as downloading additional malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://krisoc.ru/uplcv?utm_term=universal+android+apk PDF link annotation
    • http://tofuyatogo.com/uploads/files/fedudikurub.pdfIn PDF document text
    • http://recviem.ru/img/upload/94303847797.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/80526248367.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/xomalewaxiditonem.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/zunuvowugamarelen.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/30266724884.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/47066454102.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/34688000913.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/74551776557.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/wuxidi.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/49653224871.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/sutadadewujodofeso.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c69b206e4---lilubufufutaf.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/12619298462.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/80512820116.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/vobemun.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/nadab.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/77590861406.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/zokoxiwaw.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/surikixi.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136ccfd1cd64---62654818955.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/golugekodoboj.pdfIn PDF document text
    • http://gewald.ru/content/Files/28171634877.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/luduruniset.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/87654890843.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_off0000cccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCF 10452 bytes
SHA-256: fe683d2b35a4dfda073f9afd5162a5d6ae6dd8f6676bf49c83463118d7ad1c72
font_01_sfnt_off0000e49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB1 20868 bytes
SHA-256: 27fb378991692e463d5c8c5902ba6562fe1477fc475924804c6bfe58d9ffb120

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