Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fe8b72ba8ca96e…

MALICIOUS

PDF

117.3 KB Created: 2021-09-05 12:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b42080c54fd895ea0c951f194f0c4e70 SHA-1: 41eb4886c98f23f8cb646db65bdf573566b1e3dd SHA-256: c4fe8b72ba8ca96ed4e576420d843b955793c6acf56801f4dd9fc9807aaf69b0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://drafthe.ru/uplcv?utm_term=bretton+woods+system+pdf PDF link annotation
    • http://kukubara.com/zdjecia/file/52578414839.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/f258fb8232d5a320e6588b3739023789/zigojewixebeb.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/i253b4k08f2s2q96sb54kbg00n/27016454559.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/troju9487019grffocs4gqgago/89210819491.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/razosidesoxesiw.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/42161954810.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/8dksrm30k5e3jqdrf22k20dpeq/37323804015.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/15128565875.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/zubopuvubupu.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/49427155378.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/301346f7a65f1f4556587ee3352f3c7a/bawabosovu.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd56974e052---zigesamorijava.pdfIn PDF document text
    • http://inse.us/uploads/images//files/togurewepusiwukeg.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/68183124194.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/3826141b1da570c02d29feca2c0882a9/polumedigavogeja.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/wemisu.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/romamapowedik.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f08cf11d0---61076029012.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/82446443892.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/ae54f62179cbec630106935318fa8927/rupunewonanidovusogovawek.pdfIn PDF document text
    • http://yejida.com/userfiles/file/57841385470.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/87844634443.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606cb3a96e198---xupubiminalojizanep.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/251a2beda5784c31ca9644f25db5cf67/28544268571.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_off0001631f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1631F 19900 bytes
SHA-256: df3be3f35d27ef8e0cd43a7d5102b21346ce6604a54bfb84e0a606526d9d680b
font_01_sfnt_off00019729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001af40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF40 10612 bytes
SHA-256: 8ba87391271e3bde73f8adcd014f168915c20647f5383c1c7a3b8cfdbc366afc

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