Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4e822282a618cb…

MALICIOUS

PDF

86.5 KB Created: 2021-09-06 16:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 11db1c51f61cf6a34313be263d676911 SHA-1: 0f12e5f1810720eec7f8aa43cc82502da9f21c3f SHA-256: eb4e822282a618cbe9359787ec655486a40d88523d45014d065b06a4e507cb4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. While no scripts were explicitly extracted, the PDF structure and its function as a gateway to numerous URLs suggest it is designed to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://mbcasc.net/imgs/file/68527363655.pdf In PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/fl4ggl0ogeo3gmv5vurl5plujj/43434018304.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/e32e0f3696697a8df76cf8b70aa1d25a/53418098117.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/59845560038.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/0adu0g66ra71le4eknok4l3b4u/55449625411.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/42431685723.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/47454404228.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/rg5d06fsdpgfvfa2rl7skp2ig3/11061111474.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bca7be94dab---jubizupe.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/75070304265.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/2413833420.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb41c66797---wotoper.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/66902095973.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/dlu9esc1agrkkila9pt5q6jk31/falowosujidogupixubup.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/39579986604.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4656c4552---76407244390.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/5ca603b64c18eb43397342e237add649/94499301309.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a835344b143---jabatemetasanagesetate.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/a0ab7487d925282c54747c7d1d69766d/24631147484.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/b32aba0f49f49afb14d56463ff0c8784/98000893133.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/gepuzezonexaguve.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2431d700f---jerabijejufen.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/1e5pakpcqkol4772leleqq6481/powewosofotodavibupivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=botellas+decoradas+navidad+manualidadesPDF 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_off0000e703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE703 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 10748 bytes
SHA-256: bb531fb358bcf562807e3af6ed8cd0cafbf55b011744d098208372c0d7472c39
font_02_sfnt_off000117da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DA 20180 bytes
SHA-256: fdc4677abf8c4abe26933183cba03a1c33229afb632c69fe49efd7b28ced6a7f

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