Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b44aa146c7030e…

MALICIOUS

PDF

71.9 KB Created: 2021-09-17 11:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1ab671f94e48d6bc40a971a7bf22b52b SHA-1: 5eea18886b0859ee97cb25a069a60a17b8f441c6 SHA-256: 69b44aa146c7030ed07ab7aca13cc4d1d57aa8694faeae3b467bdd407f32f706
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://penzionriverside.cz/files/file/83819683643.pdf In PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30673074160.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/tawofet.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/22708130662.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/14363966639.pdfIn PDF document text
    • http://chinatriage.com/ckfinder/userfiles/files/98028118201.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/wakamabawitafixijinesida.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/161420ee1a2024---80727244924.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/93180065998.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/nrmd35pk0b2lbrb4bld1h8j5hf/87175146232.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/zeluravifotelanik.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/41779611681.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/98439149071.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/32533459367.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/tulapi.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/302496966.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/wizijezuvoponavef.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/30302740926.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141d10d5e95a---6578054983.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/75533870177.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/rarulinejabalokavozufez.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/s48n1u424b2nlc578lltvpubhb/96147928267.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/72656840112.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/votibumipuvevofo.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/govugipi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=your+phone+companion+for+pcPDF 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_off0000b713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB713 16652 bytes
SHA-256: 628a8fe1855f27c7d1ac9d723106ddc7ef05931664454edbfff2fcd7c96eb9b3
font_01_sfnt_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 10516 bytes
SHA-256: 61025e73cbd8f8fce63a7ee46cd4d23c0ccc38843202b7741f5c9f1838e4e0bf
font_02_sfnt_off0000fa15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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