Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eecadf5bfb3932a…

MALICIOUS

PDF

72.2 KB Created: 2021-09-08 19:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 11f878e8cdb7f0353678c7297b7a2503 SHA-1: 1cc08bc08ed64248a3a8bbb73aea80bc0a4803ab SHA-256: 2eecadf5bfb3932ae61120bb8166060f37dc79a29a35b55746d3b0864529e007
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, presents a deceptive download button and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rcp-ranstadt.us/files/78620745265.pdf In PDF document text
    • http://elisa5888.com/shopadmin/upload/files/puwuk.pdfIn PDF document text
    • http://sowiik.pl/userfiles/file/gedawevisojukefase.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/29296343651.pdfIn PDF document text
    • http://yieldpharm.com/upload/files/92684462956.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/64250514506.pdfIn PDF document text
    • http://tnmetalworks.com/images/files/ruxamumi.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/98537963445.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/vusepabipakopekagol.pdfIn PDF document text
    • https://etimes.mn/uploads/files/48784603754.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/82251025006.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/88098927165.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/toxegexopetara.pdfIn PDF document text
    • http://technocom.pl/editor/file/67038176257.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/nakosokapumemajefipasa.pdfIn PDF document text
    • http://eltprof.ru/userfiles/file/garumatumajanotin.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/tevuxerizu.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/vepumadazejupime.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/bifimulakuboguba.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/vorazikifiputi.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/verimagefopaxesozejosu.pdfIn PDF document text
    • https://maria-galland.ru/files/file/62259965109.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/64703661991.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=practice+test+plus+with+key+pte+academic+pdfPDF 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_off0000b6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CE 16436 bytes
SHA-256: 9bfbba55c3a9c4ae2575415ee1e1adb38be8da4a07b6a236073a3c04aadcaafe
font_01_sfnt_off0000e170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE170 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 11056 bytes
SHA-256: 74460201c61b03133f859fe8849e9c1ec5020da2a4cf07f575edbe7a2723429e

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