Malicious PDF — malware analysis report

Static analysis result for SHA-256 009111536be58978…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 11:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b8e5e5e06908107d63878b7141f0435c SHA-1: 78bac7007b68b602b69c6e0e74d002549ab0323f SHA-256: 009111536be58978942ffa7f75522bf021b69f9d2e3c8f3a367d4c6eb4713523
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites or disposable hosting. While no scripts were directly extracted, the presence of external URIs and the overall structure suggest it is designed to redirect users to malicious content or facilitate downloads, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/45a92f7b6da5b0aaed4fb0a6b0e2dcaf/76260378519.pdf In PDF document text
    • https://bepxuyenviet.com/upload/files/nusomefurelole.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jalavinawezir.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/49106707504.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/6c87a4979c41bbedaf8a8df2f1dda63a/17303469006.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/37629124077.pdfIn PDF document text
    • http://olguanaokulu.com/upload/file/tesesuxuzatazopimilawene.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/wobakivuzapisularilufo.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/kosinelivevesotape.pdfIn PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/bagumejepizezapunip.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/14203469693.pdfIn PDF document text
    • https://wita.lt/images/files/60305456396.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/k32aslqr8123rhs0o1e7id9pi9/boroxovape.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313907c8ce4---pufulomogesem.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/58265141547.pdfIn PDF document text
    • http://anm-av.de/uploads/files/nagerazexij.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/97610877633.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/15476910206.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/woraragekowotiwurur.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/zebumubakevewewof.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/kijutomomidamedifir.pdfIn PDF document text
    • http://protok.pro/upload/files/mesavabonimowanufikolaju.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/jijifirasipem.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/79423989092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=katzung+pharmacology+pdf+free+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_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 18428 bytes
SHA-256: b1c3c0f2b4e4201306af9e72672ddd6ab7a3151399cfee53a86fa6eb0adbb460
font_01_sfnt_off000107ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC5 11156 bytes
SHA-256: 80d88d71e33edb980187626428f5605e5cec46ff7165777d58c0bead6f5fc206

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