Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e62f3c0c5446d6…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 03:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d810afbae0b2ad202b76af843a7073df SHA-1: eaae1eb2b4b32194c34a5e358a73f5ceb1e11b07 SHA-256: 89e62f3c0c5446d667465e32e06a6265b915438b928458a81712a4f228b3ecf1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV, indicating it is a Pdf.Phishing.Trojan. Static analysis revealed multiple heuristics related to PDF link farms pointing to compromised CMS uploads and disposable hosting. The embedded URLs, despite some being marked as benign, are part of a broader pattern of directing users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

Heuristics 5

  • 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
  • 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://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/4c595379785f3d892cc71111efe09bae/42984197850.pdf In PDF document text
    • http://nhactheducthammy.com/upload/files/vazijumibuwadugores.pdfIn PDF document text
    • https://kamwalibais.com/userfiles/file/wubov.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/jupubovakagi.pdfIn PDF document text
    • http://yuh-tarng.com/userfiles/file/50564858138.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/86301129167.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/43715818097.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/xudugeduvamomabat.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/xakaduwada.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/mutedaveduzibuxovitika.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210906020849.pdfIn PDF document text
    • http://telektrans.hu/editor_up/kebotal.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b4bac9c3b0f69b582336fc4483a21931/81448781034.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/jrse0hot9gfvb64mgjjs7hfu18/30034257176.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091706335173.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/32069485157.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/pubonajudafisopiwimuv.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/73428826639.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/70547244905.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109010124434718.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/48068723120.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/kixudumuxalukegonapas.pdfIn PDF document text
    • https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/46889258110.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/33429181611.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161436c64e2535---gefidorag.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/23588951707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=panda+vip+apk+downloadPDF link annotation
    • http://irodori.kir.jp/files/file/22416183149.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 18324 bytes
SHA-256: 64b16ca79dce3470c586ee7ee1340883db189b29bcdca01d5a9d52bfde00744a
font_01_sfnt_off00011ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1