Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e140331d79439b…

MALICIOUS

PDF

73.5 KB Created: 2021-09-18 18:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e3dcbd6da6399e4c2731e356eb609eb5 SHA-1: db596188fe1cae052b75566ffd336c5f2a873760 SHA-256: e2e140331d79439bda0de42e6af19a29037821dfb5700ee302667fa72bd2dc01
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7099

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abd030fcf7---62252312554.pdf In PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/bajazola.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/meniwebazi.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612f70b9d9d69---4858814780.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/84835463185.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/49102583994.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/94297535533.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/15732688029.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/23677080116.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/36321655101.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318f47114f2---23261616762.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/jazivujelopoguxe.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/lifalofi.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/zutokonugikikidokur.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/mawerofirivakubigiliriw.pdfIn PDF document text
    • http://skene.es/userfiles/file/20448543788.pdfIn PDF document text
    • http://xn--hazrdner-r4a10d.com/alisveris/yollanan_resimler/file/nupokokogerukosinetojapaw.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/kuxenirimodomiditen.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/d5a34cbc1c3a0b5b2c1816e99d451205/75958673958.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109141812013181.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/gawatepatadenatolezejiv.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/zuzesuwubexufapudupojawe.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/widunuzolelun.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394ef753e84---76623659953.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/19453510496136809812dad.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/79666638884.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+use+your+phone+as+a+streaming+cameraPDF 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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF443 11064 bytes
SHA-256: 153204b8e79d8dca911b9fcfa6e3ee83c100513aec80158835046bdd668bb449

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