Malicious PDF — malware analysis report

Static analysis result for SHA-256 abee1bcde9f3e25e…

MALICIOUS

PDF

89.3 KB Created: 2021-09-18 04:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 45e7d5dedb92f7a33c22f01a29025ee1 SHA-1: 304f90426b26e078bb235c913b5f851192206ee0 SHA-256: abee1bcde9f3e25e524c68c10e8579c5a693499ec018f4b55ab9e6647229c883
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. It contains a link farm directing users to multiple external URLs, several of which are hosted on compromised CMS upload directories. The primary function appears to be directing users to potentially malicious content or phishing sites through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://unitytradecapital.com/ckfinder/userfiles/files/44696214923.pdf In PDF document text
    • http://icoenergia.com/userfiles/files/jufegawumiragabajebimapun.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/fusafegone.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/neronob.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/pegoperofepuve.pdfIn PDF document text
    • http://immopolignano.lu/images/61332490702.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/75615244075.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/4855681332.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/55304006828.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/98959120851.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/3234953596.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/83828234662.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffb929612f---bevakugokonowezugobaroz.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/witewusafimawojirasibafit.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/motoworuvidipuvopowoba.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/87d2e83d9f30bf3aecf35a260ceedb82/fefoginafilomobizekuvu.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134bc93a498c---66913055873.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/dl9i8e46clhgu8p5gfepmpa7cj/regirorutepixeza.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/35723135113.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/teziwabidowesutazudodob.pdfIn PDF document text
    • https://redac.ch/upload/44430874667.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e13f1d1ddc---dojoponenebaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=where+can+i+watch+mha+heroes+risingPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/27617820308.pdfIn PDF document text
    • 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_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10432 10712 bytes
SHA-256: 5829ff2d1401ba51a17e70750029ee7e730acca973ac3533f82b777f97e67985
font_02_sfnt_off00011cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB6 22612 bytes
SHA-256: 07a15ab86a7d99169a7ad48d7c0d2789f7543caca5475822e2785d260b5a6205