Malicious PDF — malware analysis report

Static analysis result for SHA-256 1922450348099a90…

MALICIOUS

PDF

79.3 KB Created: 2021-09-21 13:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a9767b4ea959416125ad104d1e91b3cd SHA-1: dadb5aaade28a0660247f467d66b62f8d191d8df SHA-256: 1922450348099a90e73797165a2a3856b697c3efcd31e2a23246019fb5ff8471
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism to distribute malicious content. The PDF structure and the presence of external URIs strongly suggest it's used as a lure to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://surinmajestic.com/phya/ckfinder/userfiles/files/71471178309.pdf In PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/butijepetawagotonizaj.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/32204668392.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/defonedusaniginowolenerat.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/jezeburisaj.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb3df81765---40538246130.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/kasap.pdfIn PDF document text
    • https://intersensor.ro/v2011/Files/fck_upload/file/xelanesowokitisikebos.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/14097411031.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/jibevilarijik.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/fuvopopebavim.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/tijowogesinuboje.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/dejajibigunilokoloma.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/41210566508.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcf7e173a7---35842546750.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/papanodax.pdfIn PDF document text
    • http://epplast.com/files/file/78146744059.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/30971248562.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/34778651025.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/76375975681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=actors+in+wrath+of+the+titansPDF link annotation
    • 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_off0000d172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD172 10452 bytes
SHA-256: 630e72db30399df83ce03d5e06d1139311397c37c49dc1fb7f73fc0a03479e5d
font_01_sfnt_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 17960 bytes
SHA-256: 1a788b0f3b560aad6ff878c7be26f1ed81aa412c9eb2eaad2889643e784a47ec
font_02_sfnt_off0001182a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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