Malicious PDF — malware analysis report

Static analysis result for SHA-256 7486aa69d1b97c3e…

MALICIOUS

PDF

78.3 KB Created: 2021-09-13 12:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5224f1f79d61e2ee52324ff4184de858 SHA-1: 7501a44a7361d6e68b0f3fd10c403d0307bda288 SHA-256: 7486aa69d1b97c3e157b0f7d70f863f3e1c1cdbc53196f90b241c283bb0c78f4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains embedded JavaScript and a link farm pointing to multiple external URLs, some hosted on compromised CMS uploads. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely for further exploitation or redirection. The link farm indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://parklanehotel.asia/userfiles/file/53720202836.pdf In PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/fogujeju.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139f5e8d531c---41758970319.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/sifixoxirevil.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/53677989824.pdfIn PDF document text
    • http://gabortech.com/admin/file/13893407049.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/bidorive.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/mulunozedemopewiwenamaf.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/5905476724.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/pazoguvogubiwifo.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/35521237366.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161392c86f0166---97875581987.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/39600289771.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/47537114804.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/42241592608.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/kegise.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/xegogavirenafepivomimen.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329ce2818b0---turepadabebuk.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/kipevuzajibavorajeropori.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/66327528536.pdfIn PDF document text
    • https://airbays.com/userfiles/file/63858162249.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/sojukepokuzepiwemapuri.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/gavomufulamusazovowaw.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/47153095217.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/bozabamusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=adb+push+examplePDF 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_off0000ce8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A1 10468 bytes
SHA-256: 8cd0c3eba08ec0c75ef5149512abf55bdc9109a00d7bb8f42d7b57a451a7a59a
font_02_sfnt_off0000fe28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 17312 bytes
SHA-256: ba53898cbca537e7a21a3053b52a2bf750aa62805611fe1c0fecb7a635addb1c

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