Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee619be91a99fda…

MALICIOUS

PDF

67.9 KB Created: 2021-09-23 11:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: e3429f12fd80c087a89200c4f634adc7 SHA-1: f5e27a12090f372765117dbb741f6621814819cc SHA-256: 2ee619be91a99fdafb68878ece5afc64f6cb95fb2db4d3756f38aae021e6db78
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, suggesting a phishing or malware distribution intent. Although no scripts were explicitly extracted, the nature of the embedded URLs and the ClamAV detection strongly suggest malicious activity.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4355

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 http://locthanhwindow.com/img_duhoc/files/20126794416.pdf In PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/82529493891.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/26652416746.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/7510cf245ac913b28186267cd8a6161e/36441377318.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/rerifawijud.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/35630651936.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ed944a4cc856032d2688c8660e93fede/90691452964.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93547776908.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/vogomawugozimufagugivafez.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/84192192059.pdfIn PDF document text
    • http://scro.ru/pic/file/73441758031.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/kisaxuvixox.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9b2b0c6d4b3518024a8aa7705b8b4984/86112455759.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/xovudimufupatedari.pdfIn PDF document text
    • http://drironcat.com/images/file/momuzejidiseramasadafode.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149606f98d7b---32550309255.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/80051866513.pdfIn PDF document text
    • http://sp2wronki.pl/fotki/fotki/file/kanexutijosigato.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/luvanararozorigabosowo.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210914135349.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/29064060957.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-14/20210914011957769119.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614857905eebe---55340561787.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/23236781540.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/60825210957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=friedman+the+world+is+flat+pdfPDF 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_off0000bb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB74 10828 bytes
SHA-256: ab16c3690c8b12169f035f719d08b4a043e5bbf4be2fbc5d23b0f9511ebcc319
font_01_sfnt_off0000d43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43F 16248 bytes
SHA-256: a6fa3348eac4ca9ccda57b47071f2c1b10e975103a3c01f380aa3ec4f85c70d1

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