Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a267fae6cfea2b2…

MALICIOUS

PDF

151.0 KB Created: 2021-05-30 08:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3040a89c703c84fb23ed8f07dbe05d96 SHA-1: 0d4f6744870c1a06091c1e0ed9cf06e6c24faa43 SHA-256: 8a267fae6cfea2b217a3632d19ff90c03b6a9d642722fc85071b303ff1556a75
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains embedded URLs, one of which is directly referenced by a heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to genetics, likely intended to trick users into visiting the malicious URL for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://oniceh.ru/uplcv?utm_term=problemas+de+genetica+grupos+sanguineos+resueltos
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/2j36maf1rapdfn4fia1qelj4k4/tovisekiputiliwan.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/363c314e16f736c7450cf036d2c604f7/duziloxobole.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/71476f0f3c061ca7dce688b9e02774c7/vugijel.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973b406b579---zipisu.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d492168205---27300676955.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072921d31b57---menixerilir.pdf
    • https://najlepsze-w-polsce.pl/uploads/97770661326.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b815a2dde---maropixemofirorepijirumus.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/365d84pfcmtrk6o2hq63nafet4/71298452208.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/tilt9nfgsubjcogbimjc9tdl4m/21647902094.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b70ce169e8---61592633459.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972828a15f4---25093101362.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160adc953c5121---kitiduvesukukow.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a19454507---bimotol.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/dp5dn1r3md4sscq5mrcd4s4t56/domurozokatogefomej.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/65310df3af88ac304bce13c636e2bc3a/wegudefanigofowadezolaled.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080b512764c6---dobubadefaxixamogu.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/509c93d9b48ebb54313f946e8b614b58/82162178279.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021529.bin
e0223841065b535ea26914e2b6f27900f59fa36f4947b03753a364c3ec765152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21529 5536 bytes
font_01_sfnt_off000227d6.bin
ed1fe4cd21e64588ebd2a6ae6524bfc0a3eceeec5bcda8932b25713aa9fe1bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x227D6 12208 bytes

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