Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb8628e9a2b6cf7…

MALICIOUS

PDF

72.6 KB Created: 2021-09-25 00:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 259318febe3cd3713008c40ee583fe84 SHA-1: 9d0d75b7bb1d168d07ef7225f548d62a5ae69b7a SHA-256: 9cb8628e9a2b6cf7d778e2d2e4c26bb674a38034f0286a9c66109f16168843f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an attempt to lure users to sites potentially hosting further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • 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.
  • 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://vinag7furniture.com/app/webroot/files/editor_upload/files/70792497428.pdf In PDF document text
    • http://otestmanager.com/club/data/userfiles/file/20210925052052.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/7163025362.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zuwokutufejotagipivop.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/mibuvip.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/51215168570.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/4d1633e1c7af9d272675526a89b2b2a8/rodavelaviwufez.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/88581325292.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/mujewadapogego.pdfIn PDF document text
    • http://live-net.it/file/67161774966.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/79094177881.pdfIn PDF document text
    • https://totszerdahelyikultura.hu/images/file/kitirusepu.pdfIn PDF document text
    • http://a-pluset.com/userfiles/ragutigodu.pdfIn PDF document text
    • http://artio.pl/files/files/14806259622.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210904073350.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/66864415235.pdfIn PDF document text
    • https://shevian.com/images/file/varoletuxunadipumag.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/lefitiwuwegemuwuk.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/gonukewejiwiwi.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426d22d103d---nanozexusetodumiramunexo.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/85153119365.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/vumirejokiwixebozawezerav.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/96824646153.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/9418834374.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/dezobelafexapof.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/rosupafep.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f92d5f92c---giruxif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=call+of+duty+mobile+latest+version+apk+and+obb+downloadPDF 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_off0000b602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB602 11288 bytes
SHA-256: d2f33a0ebb934b9197b9eb073516bb47180b2ff099480790519777e2e467644d
font_01_sfnt_off0000d069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD069 16808 bytes
SHA-256: dda0daea6bba577682a031b73e2414ecc2d8b301ddc2032db839585bec8e08c5
font_02_sfnt_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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