Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb723cc7df9b4174…

MALICIOUS

PDF

99.7 KB Created: 2021-07-21 17:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7109d37601d3756c7d74e2d9f2cc425d SHA-1: 5f81e98224daf7bd9a2de09f595ddaf22c9d02d6 SHA-256: fb723cc7df9b4174a2740f40c78023f3ec81649d5ede35dad52161d289bae171
164 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to host and distribute malicious files. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/bdjsgt2798976jr63qm9sgl7qv/85119582187.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0c56c715---6937592752.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/82389588210.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/tm0uq8e5n2ep1diuhrm66uma1c/23646262321.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079052e2e967---fikajugazojivunari.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae478bc7a02---laxododanojazetuxowuduka.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ah18hmguqhmtlh1fsmrjrt44rp/zuzunokex.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074d57dd3e16---larofawuxumajadela.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160863dfea7988---bisejoxivolimasag.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/4992337815.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bff63c666---98987198224.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e1244d3c972---vikorul.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f598efc83---goduxajewezana.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5396b6302---bafidominorinefasufafed.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adc77896b8e---lemedilipavijurovodure.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/guxamasumixapas.pdfIn PDF document text
    • http://talleresjpg.es/img/file/93406024514.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/903527bf2bd5df05c6378fd51334295e/38881052919.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/d0a6fa3e10cb9644c4656d8269bc9ef3/xinelulerukosexanol.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080af69265b0---murav.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78707054757.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/dac7dc9627ba7eb9f87d8eea86bfd5dc/lapax.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/70014308013.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d41bfa5828c---fumekupujasujuferun.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/voburefefex.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/10630698819.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+king+of+staten+island+full+movie+freePDF 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_off00011d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7E 18212 bytes
SHA-256: 0270dfed74f8ef163699f0bbf126983f502fd2dea641e833e773a86eb055c885
font_01_sfnt_off00014d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D31 11024 bytes
SHA-256: 77a67dc8e79427003aec2008da1e56d6e570429a40b7eb382c60815304b94ec9
font_02_sfnt_off0001667b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1667B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.