Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae4bb84af0b8be0…

MALICIOUS

PDF

69.0 KB Created: 2021-09-30 13:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 83e32ff77b3f43b26f246dbcc2f7f3f1 SHA-1: ff524b58fac207104f15f0b33426135cf266d53f SHA-256: 7ae4bb84af0b8be075c6a992c8a9c128ecb80671d016af1d23414f0a846fa4db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URI heuristics and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://philabc.ru/uplcv?utm_term=bedroom+eyes+full+movie+watch+online PDF link annotation
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1bdad4392---benat.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/12965386082.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/robosumolegikegukiteve.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/dizulo.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/vevubim.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/fuwikikitoxa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4ccc55d9d---nibefagew.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/xupotoxoxonisofev.pdfIn PDF document text
    • http://www.og2c.com/images/file/26892253742.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/e7db1b922292e311a6e308f64201ecda/91521493534.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/1inqk6r5i76a4p0doja16mr2if/84459062102.pdfIn PDF document text
    • http://partiaweb.ir/upload/files/gafefagebufi.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/70794597289.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/ropunik.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/21507643270.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/61125524716.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/vupexupufijupadulalonobak.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/xoxerumijoba.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/93374132485.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/adead619b058273d6e8f588aff525e07/dodasutomupefokuwobogif.pdfIn PDF document text
    • https://timminsrenovations.ca/file/wtwWaDTr3r2VgwEW.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/90162244931.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/087daf4772e83244caa0a4b58fce904f/70414296128.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_off0000add8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD8 14812 bytes
SHA-256: b87fe5a721d5beaf16976090ed2d309b310aa59b48f37ee6d1e7cf466b1c0707
font_01_sfnt_off0000d2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACD 11160 bytes
SHA-256: 7dadc7498baa97f9ebdc09c95f0ed3f6c4b9e92a3f296f82c99b0565a32ccdff

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