Malicious PDF — malware analysis report

Static analysis result for SHA-256 82077288d8d8fd23…

MALICIOUS

PDF

86.9 KB Created: 2021-09-12 03:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f4a94dd0c40772ebe80d7b6131113975 SHA-1: e38c770e0bd94b5c1be26b12b41c65ca4bfb56dd SHA-256: 82077288d8d8fd23a6a7258ca8da73956168f17727ecb2c0b85fc50ac6f1ddb6
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning model and ClamAV, indicating malicious intent. It contains a large number of embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. The presence of these numerous external links suggests the primary goal is to direct users to potentially malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ketchas.ru/uplcv?utm_term=movies+hd+v2 PDF link annotation
    • http://adidravidar.com/ckfinder/userfiles/files/kawiroziwodariwok.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210903044309.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/visarenuxumasoma.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/15997622932.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/ponejuluzarasamo.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/80307663132.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/74602684829.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/50602433936.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/vexigijiwakovagak.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/jixujepaz.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mimejelisipazijuvegix.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/gadudol.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/72413793651.pdfIn PDF document text
    • http://rentaruedas.com/files/others/47566417432.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/lutadifizovutisu.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/87340566198.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/zafakijolelax.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/nomezutovufab.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/somoxunatiw.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/dosofe.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613362617507c---17395543110.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/d566d6ec9965cf0b79a5d61747f18102/47692130198.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210905001316.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_off0000f139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF139 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001094b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094B 18312 bytes
SHA-256: fdba6335c44d9ef17bd29c820003e07fe1a5ebdb1cd6f898e3915d1a17613f91
font_02_sfnt_off00013869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13869 10012 bytes
SHA-256: 96558e6572303802e40ab1d3eadcd330aa01e7414bf96848fa53b2dbe96f97dc

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