Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d304ae82e8723a…

MALICIOUS

PDF

89.2 KB Created: 2021-07-02 12:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 646667a78128b24e542d28703e5acc50 SHA-1: e125e961cbef15472fa4d082df553baf0366e3ca SHA-256: 42d304ae82e8723a7d3b36e1649610463d513b37257132d4828cadba3af783e8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite one being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The wkhtmltopdf authoring application and the nature of the embedded URLs point towards a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b121c6e221---88845480938.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d632d0627f5---nizakarupomusedakuzafilav.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d577a0f920509a2b763d1468a758c19/pezamobofane.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/4de650976a27068e7b2850a5dd872bfc/nidura.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/iugjs5an8sfajcrugss1bovql1/88486564690.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849226d11a7---3420416127.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071d4088f2d1---17409226543.pdf
    • https://decoveinvestment.com/userfiles/file/42504239697.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2df5e37ff3ec9849fedfcf371a0497af/nelidosizabowozod.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/gu9nu0vq23ntesj7q75sum78tn/17326149523.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/89fc1515881e1557eb5c8dea5692b0b8/62694681297.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abad8499d2d---kozejexafefilupipamopub.pdf
    • http://anandamsanyal.com/userfiles/file/gapopubitanakokibemiwum.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/q7vrj6lrjqealdem6klv2qrqme/nulep.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff9dc00e2d---56437735881.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/2bd68fe390e34f74af056acb32689723/satifo.pdf
    • http://sunnysolutions.it/uploads/assets/file/guruwawupofepa.pdf
    • http://china-zub.ru/userfiles/file/79096952493.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2qoehniuorp773tqfbjb2mtd9o/32819503662.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/499839a652e6beac62a7278292a37b00/54891497165.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/33110433d291a0d6fa2cce7ecc43cca1/31131410516.pdf
    • http://cateringkieuan.com/uploads/userfiles/file/jexumiwebukajegejijizuw.pdf
    • https://transport-vehicules.fr/userfiles/file/50175384566.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087950a829b1---jagudukidipufezajesomutaw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+get+unlimited+diamonds+in+choices+game+without+verification
    • 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_off0000f7a8.bin
780fecd4cd267a9c82789a93c62634f4a1972cd64a85e1ebf894bbcb7cedf1c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 17332 bytes
font_01_sfnt_off000124ec.bin
9f7c14d6900e537e1dcdb0365ed0189c3c00ee483db9c33c9ef8ee8f55207ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124EC 11164 bytes
font_02_sfnt_off00013ea3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA3 16792 bytes

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