Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1aade451d3808ef…

MALICIOUS

PDF

95.8 KB Created: 2021-07-28 04:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1b32f86120e7619e55e35b5ac27addc7 SHA-1: 5b4a05b6fdc400f2f4db6596122a8b879c671b15 SHA-256: e1aade451d3808efbbf9f5314ec1a801ceac4a476ed1b75e25cd7b0580dbb069
124 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to malicious content or phishing pages, aiming to deceive users into visiting them.

Machine Learning

  • Nyx PDF Classifier clean score 0.2156

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://burgaseguros.com/userfiles/file/60536872801.pdf In PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/ee1524626039059a4f7c391a4c518e77/17024604062.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f8c158880---pukinavamukojepidobas.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/kajunosefedesonebobotiwo.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71764ca8ee---fogujumisuvufotabuxuruza.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/16064126928.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f2f8eac4f6d---95074798946.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbceb10ff7a---tuforob.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/58995246040.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/82405603762.pdfIn PDF document text
    • http://aweibel.com/Photo/file/razuzemofedutezepipaninib.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b37224382bb---45315692309.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/97651118248.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609850971fd74---lenesokijimojolox.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/45384407262.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/813a7a6d49f91bbaf4d4021ba9002792/levigade.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/56392485111.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c449aa546---zujigalidugejubajuvipedu.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/bepag.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f47de22e88---81435750446.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/90957224470.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9333aaa12f---20159380730.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/631bf4d877eecf665c057889ec52c2b1.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/98152648183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+is+the+strongest+intermolecular+forces+in+c2h2PDF link annotation
    • 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_off00012ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD3 17792 bytes
SHA-256: 9f6eb0b5f556bf657687bae333eb28171517b13ae796d9d73e8b26f968e59d17
font_01_sfnt_off0001599f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1599F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1