Malicious PDF — malware analysis report

Static analysis result for SHA-256 69367713900b7518…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 08:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f950bd60f2ba584462ae23829e4cbf87 SHA-1: 6b5a68be4c663f0d1697095afdb424b17a6b722e SHA-256: 69367713900b75180ef681923c1588c7edb64c7f1925989dc483ed9700767443
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://manhremhoangvan.vn/wp-content/uploads/files/banuzarebulinemub.pdf In PDF document text
    • http://www.luna1956.com/images/library/File/30689828219.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/nopoloduwipupasokuzokik.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b0f70b724---66365241984.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/76932549534.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/vibopipok.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/6277ab6451d720f9a669f91764d41baf/47869007059.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/musesivixaloxelasig.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/83630330308.pdfIn PDF document text
    • https://laznia-radom.pl/userfiles/file/37619159791.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/o3ggjbqhea7rcf7odchallv3gj/ruvolaler.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/muwuporapi.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/sekotuvilivewa.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/10821851366.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/neveg.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nopuwopumetafojewina.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/jaxixuzujeruniw.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/tugesu.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/xukukomatatiganelavanofiw.pdfIn PDF document text
    • http://novastal.pl/userfiles/file/bonerosab.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/67861251025.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/59268367544.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/suligekixiruvilawituwe.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426b830b4f3---65493144190.pdfIn PDF document text
    • http://safires.cz/ckfinder/userfiles/files/3192303867.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=nintendo+wii+emulator+android+apkPDF 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_off0000d3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B0 10640 bytes
SHA-256: 00889fb2e20bfbea0d354797040432080776a8b4d1a8467964d99264ff14eb41
font_01_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 17852 bytes
SHA-256: a5e8469376ecf87fa3f21ee442cf8394abf40d63ce0e6d58f279e54e3bcb78f2
font_02_sfnt_off00011a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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