Malicious PDF — malware analysis report

Static analysis result for SHA-256 201d6eeded8a75bd…

MALICIOUS

PDF

80.2 KB Created: 2021-09-09 00:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cadb372d544c805a75146d8f1f7a0bfd SHA-1: 81f62b258c9bc5ac0d722ced9b7c3bdc5d340044 SHA-256: 201d6eeded8a75bda2fecee99119620c35768cf30a71d3fbea6a68d7d0f4d5c4
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, pointing towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://ccsl.asia/files/simisugezijakogu.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301393004b4---83296676897.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/ranepifogov.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/16382660152.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/josafesaguruwopujofemaded.pdfIn PDF document text
    • https://izr.fr/files/34730449645.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613347065b156---pixukudevekujunewijid.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/f80bca061dcef1882c9d988bd6b83053/datuvaxetufi.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/88266654221.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc3b5e2d72---57579845547.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/fusuxu.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/hlf4klfku3ogb3slqtjqp4a9ot/lelibokipirikozobuk.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/fusufafakiwijoxarapawuf.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/21037440113.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/65846449075.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/xaxajukofizajawifagiv.pdfIn PDF document text
    • http://saint-party.com/media/file/90973158898.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/borutozuligewamaderoxiw.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/xufija.pdfIn PDF document text
    • https://helices-evra.com/userfiles/file/fisuzafilupazefa.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/kufokeviwetetanik.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/banosujute.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/2731230503.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/kisuzuj.pdfIn PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/mefowizozu.pdfIn PDF document text
    • https://brianspradlin.com/userfiles/file/zalajipumumiwup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=android+programming+tutorials+eclipsePDF 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_off0000d3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A9 10940 bytes
SHA-256: 57307881acdb64b0852132b2a06906f12e98b762fe411d3e5252b218982899ad
font_01_sfnt_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 17820 bytes
SHA-256: bf19de8906a88972f29c157b12c880a874d00786e76a1cfcccc22c196aa30e6b
font_02_sfnt_off00011acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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