Malicious PDF — malware analysis report

Static analysis result for SHA-256 fceed559fb67405b…

MALICIOUS

PDF

84.7 KB Created: 2021-07-02 23:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1c68b25f7d67feefdcbd54067f18706b SHA-1: 4531acf3e05c7b0a3340e61daf33475c6dd3ec1e SHA-256: fceed559fb67405bb9bdd64bb1b42c4016a204be93c43b1a13ebbd47852db343
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ML classifier also returned a high score, indicating a strong likelihood of malicious intent. The primary attack pattern observed is the use of a PDF document to lure users into clicking on external links, likely leading to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://buffagiuseppeinfissi.com/userfiles/files/taliwasumegelitonat.pdf In PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/b37d9b073c4c767e66035187674bb2ed/30594219038.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609f465fe257e---darotitolegesoxilebapewa.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/subuwagalutobasapuxulus.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/ee93a8cb57feed5b11ad28ba598d4174/jiposisemamiwepali.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/91474121114.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084b7c4e442c---74852616528.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/70721671156.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/271827411191.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb1991b12b---6405317512.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/39450134495.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e782c5b479---komonorivu.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/14937989453.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/xajegaw.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/b4f701b1b6ffe72a8a584812956db88e/desux.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/dowozulifigev.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6ebee0db3a70b33e4d24d0ffbfbc5ab8/wopakaxipebogor.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c346420c3---40274176915.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae5b16d2ef---rizidexerifexekilavevaloz.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/49825e3cc37fb9efa6ccab9a9bcdb8e5/xileworofivi.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/85428253292.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e366f57bf1---54724012598.pdfIn PDF document text
    • http://rurisnet.org/images/file/fipugimuwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=pokemon+expedition+price+guidePDF link annotation
    • 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_off0000e85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85B 17076 bytes
SHA-256: da77f0c5b5b15dcf597692f95d6607f5838bdd190caec696cdbed0341939af36
font_01_sfnt_off000114e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFE 10776 bytes
SHA-256: 4783e1d39308ea4b8d80d9cde4009ad724fedb423f7a95ac11bf8b87e28042e3

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