Malicious PDF — malware analysis report

Static analysis result for SHA-256 92960deb888cdcb2…

MALICIOUS

PDF

90.0 KB Created: 2021-09-21 06:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ea2fdf0fb875103c8d3e542007ec60e2 SHA-1: 2ec1f1ed910c77bfaf433080cbdc60309158df43 SHA-256: 92960deb888cdcb29567c9dac7a701c15d3faf45534387f6333c75a0ed8cf0c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=multiplayer+survival+games+ios PDF link annotation
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/31b9c1b74c03a9d7098af736d77f4a7f/wodisufidenixojamutoxun.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/93837086149.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/zofaditosefe.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/ecaf7b268c7d5539f80f793792dab38a/rowexeruwivutidaruv.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6bc9d6a2b---85622706587.pdfIn PDF document text
    • http://net-marketing.hu/images/files/rafitozusejidekapazu.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/nimutujexoli.pdfIn PDF document text
    • http://nensi.si/upload/file/98428499759.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614172074cc12---gorafiwiwiveve.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/78124337814.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210914_24B301AC4D68F588.pdfIn PDF document text
    • https://arendic.cl/files/selakegikir.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210909_0D190F21826686BE.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/50178026575.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16146a4fa928c0---rinadizo.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/2afd660085d4e6f710466f80b4b4175c/todawedivolovamajovufe.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/24081767444.pdfIn PDF document text
    • https://podimercrm.com/img/files/vokarideduguvewepo.pdfIn PDF document text
    • https://ksuskalology.com/images/file/33924000089.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1613eca39619a5---58122080958.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb938dc0e5---mefuzaxif.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/5535352905.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kawizafi.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_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 10764 bytes
SHA-256: db8e0a538daaf92d20ef5226c82b7e79b2c68de916b91b2401ea99ceafd149e5
font_01_sfnt_off000115e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E9 17132 bytes
SHA-256: b7b72bfa29e5a5279d48fee867ddf26e475171499b57048690bf5c11d0d44e26
font_02_sfnt_off0001425e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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