Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ba9b9ac84fcf04…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 05:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6e583ad5fb2eae436fc2fd7fc85727f8 SHA-1: dd8634084f49b4a08587ba219909d70bbb010d16 SHA-256: 24ba9b9ac84fcf04e830d1d965a5683bdcab54c6449923cc1e2b4179a8bff600
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple disposable or compromised domains. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://konferencii.org/web/uploads/assets/file/dugirowu.pdf In PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/85879358116.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/vamumiveranusulusafizi.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b2b0c795c---82445499110.pdfIn PDF document text
    • https://keongracun.org/contents/files/99530368812.pdfIn PDF document text
    • https://emenu.hu/editor_up/kuwotuwasejoluko.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ff0e4981c---zipujufunavireratepe.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/venawopana.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/1964344763613630c410d43.pdfIn PDF document text
    • https://laps.pl/userfiles/file/21128854608.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/c31b4ccec99b51d934cbe2eba0a3fe0a/24777861818.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109121154159256.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/32621516194.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/32318041064.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/leluzodasotikuji.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ead17d21e8---vujupaberegabujiw.pdfIn PDF document text
    • http://moristas.com/userfiles/files/gakud.pdfIn PDF document text
    • http://dsraxys.com/uploads/57922111378.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/e6e9640319ded891dbe75fb786d09fef/povatu.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/27187845611.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613492c94e36b---96215678848.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f56d1ed9bb---3067817392.pdfIn PDF document text
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/nexod.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/3595235194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+disable+google+on+androidPDF 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_off0000dbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD9 10640 bytes
SHA-256: e22dcd4a48d1f51f9f3d300285adcac286edb67e7092b1bc67507a128a21fce7
font_01_sfnt_off0000f41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 17652 bytes
SHA-256: ab0b5a3512b16ed54b12a360efbd55a5b192d18807a4d2ecf1d4e88edad8145c
font_02_sfnt_off00012177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12177 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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