Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db0baa6ac765d44…

MALICIOUS

PDF

83.0 KB Created: 2021-09-18 03:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fc8a0654a0842725d6b8515ef6b16420 SHA-1: e353bd6493c947de9e60165a4adce45e949316c2 SHA-256: 8db0baa6ac765d4486b767a2777caa99e80e6f8f2eae78396a29554edc631544
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, with one specifically noted as a link farm on disposable hosting, suggesting an attempt to redirect users to potentially malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://inwebjor.ru/uplcv?utm_term=watch+oldboy+2003+online PDF link annotation
    • http://avalon-essenzen.at/userfiles/file/wofip.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/75044935966.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/13400830110.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/14296046858.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/59154513800.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/puvib.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/97843368136.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/bawusawokuwokonos.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/31027993399.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/rakavedeleziv.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/xoxixewixixojojuwuzi.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210912043639.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/datono.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/fogasigamuzogexijojamuj.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/24625550612.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/vuvanurivujazigifusis.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109131818392691.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/kii0eo31ar7f0n2fbp6a4bglfh/16004461058.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/motewogelutuwi.pdfIn PDF document text
    • https://bkairconditioner.cloud4demo.com/uploads/files/wekezuwomat.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109040226557662.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/jukowudebiz.pdfIn PDF document text
    • http://hflchw.com/upload/file/fafatilawetuke.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_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 10860 bytes
SHA-256: 413445e7fa7bff26ec2df9af7a02d990c5eefa2ad40e85e325057e06986e7da1
font_02_sfnt_off00010d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 19004 bytes
SHA-256: e28db82fecf67a69c5f2d8b612537826f7001a524ba1ccacc6765aadce17b94e

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