Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed10de045fc37dde…

MALICIOUS

PDF

86.7 KB Created: 2021-09-18 17:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b782a29d402a0b54c349f0f07cd7af3 SHA-1: f286161243c58ed3a93bc87a2c651a4a090f3dd5 SHA-256: ed10de045fc37ddeea81fc9c26fe480f0ad5004e9c7bf9518cfad5f7d0b60764
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=jurassic+world+the+game+mod PDF link annotation
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134bfcb58b7f---larerodutesezefefenutixaj.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/92921359729.pdfIn PDF document text
    • https://nsaimmigration.com/userfiles/file/lidibupojozafuva.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614007939c7fb---88691385158.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/5743188658.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/vodelofupubu.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/6293295614.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/93510992.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/xigasimapug.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/guluzowo.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/disis.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/ziwifugifer.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/dukuxituxodapopuxolexo.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/31314429326.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/pavutodevaridabijadibip.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/95827064051.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/folepaverijadafu.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/11739735922.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/zojezavunidoranef.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/jogeduvar.pdfIn PDF document text
    • http://sunway.me/uploads/file/1010251569.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/gafusogosogeratirefu.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/bd1e7fa4c3becd48d12600b13bc9da3b/vosipibirixekutud.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/32025846799.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/ritawir.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC12 10892 bytes
SHA-256: 6aef98a03df00ca3e5f4d779dc8503bce4e413156a6249b995940f6e7c22f85a
font_02_sfnt_off00011524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11524 17680 bytes
SHA-256: f7fe9b208ef321495fbe5b57f12d156e7c0cee0af45872540efa9fab9af54d65
font_03_sfnt_off00014309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14309 2044 bytes
SHA-256: 9ff0be215eda4510cc1b192ab1b3482226358aa5dcf0ff2a485682e2549b9830

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