Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b57401daefad6ab…

MALICIOUS

PDF

121.7 KB Created: 2021-07-04 22:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff8da5540be34742e3d47e558861d513 SHA-1: cd230e22fe2cd003a604f432cf702b1c0940809c SHA-256: 4b57401daefad6abdf99d908dbfc09838980fb0be2d2535a47eb453890992b87
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, many of which point to suspicious PDF files hosted on various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e5ea2c9d4---51649945697.pdf
    • http://fzsvybbs.at/userfiles/file/jomarunedebis.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b690de78592---61983904175.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609d34ec6acf4---35938932813.pdf
    • http://indel.sk/userfiles/file/ferodojutunegukegiji.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85fd8d044b---pebotarakutokajij.pdf
    • http://architects-desk.com/uploadsfile/50443616493.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098606142512---tafosigunid.pdf
    • http://greenplanetnepal.com/userfiles/file/41008743994.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/3gsuttns6qcu4tvlho876ukrab/fawofupagijalafalixebetad.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/6e34d71457b5c5a820c9b67853a9c30b/gajat.pdf
    • http://iehyun.com/editorupload/file/32523463538.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98371aa6d---97992044291.pdf
    • http://gdgom.com/upload/file/210611150052976304rm2lb7gkh9n0.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160928126d1873---pewugapejefabowo.pdf
    • https://abyway.lv/images/ck_images/files/68763924617.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a683594fe44---30256818690.pdf
    • http://zoncmswebsitebeheer.nl/files/editor/file/tesidawebugume.pdf
    • https://hostingyuvasi.com/calisma2/files/uploads/25989858031.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/o6c8lu2c4q4l0ksjojggfqbkkn/10305463022.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/36e353d2561a1f7335ce3a4a310014b7/30606210702.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/36ddbe866362f6a8d702470f7ce5b618/47291812375.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/4b578f4a374d9459b830a7dfa6bbdec0/lofetameno.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbcb6e5db5---xikiza.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608000557264d---vetofomekox.pdf
    • http://eshop-kocicinadeje.cz/files/file/sukorapekuwapadoxosegow.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+add+signature+on+preview+mac
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000177b6.bin
7502cc1fed426c429dad89ec48da7f3a91b680255800ebfec159e9039e5b0733		 pdf-font-stream PDF embedded font (sfnt) at offset 0x177B6 11052 bytes
font_01_sfnt_off0001914b.bin
4d6275d275fc16c7cd5d15b5b63883a04dc336b4340d422323424ae69400c90f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1914B 18044 bytes
font_02_sfnt_off0001c0f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0F4 16792 bytes

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