Malicious PDF — malware analysis report

Static analysis result for SHA-256 456898804834655f…

MALICIOUS

PDF

88.4 KB Created: 2021-09-17 03:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f46b568624a9bec32f648fd7511f1bd0 SHA-1: cb39d78469eb3fb8f0b8322edc694f3abcdedca6 SHA-256: 456898804834655f9f050754047aa7bb95ac6cbe83ff58479f8910a7dbc4934c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous external URIs, many pointing to potentially disposable domains, suggests a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://cokhilegia.com/upload/files/kavuzejumag.pdf In PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xiboraguzipipise.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/23648140888.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/40191115577.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/xilojaberitenut.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/20014179996.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614104448312b---sabutudowulu.pdfIn PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/85100618907.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/161368f612ecbf---59589702126.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/tabegiferul.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/89020173969.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/78728392152.pdfIn PDF document text
    • http://eichler-kammerer.de/62907613463.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109162207583347.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210917025031.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/gapurunazusisakage.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/51734064419.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/16181285878.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/wazaruj.pdfIn PDF document text
    • http://amdind.com/userfiles/file/tofalonomukemop.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/fumusozezamon.pdfIn PDF document text
    • https://badrivishal.com/media/feduxij.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/magowufafavoviralobi.pdfIn PDF document text
    • http://coconut.hu/userfiles/file/ramibawisunawevatowofigut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=war+of+the+lions+androidPDF 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_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001065e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 20064 bytes
SHA-256: 0b3290ae9c94f30ecb55b98f2b5a0105972bc2e27a45e395cbcd9934c0cce823
font_02_sfnt_off00013c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C05 10444 bytes
SHA-256: 1fa355bf04c1f7912a030a12de73447daaba546eefbdccc12e2a7781182b77e8