Malicious PDF — malware analysis report

Static analysis result for SHA-256 58856809c9686b40…

MALICIOUS

PDF

202.3 KB Created: 2021-09-03 04:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e1b4781f88f806901a6ef94e09adb26f SHA-1: 22eb672ad428246a5668ad2cdaacb32385b00c59 SHA-256: 58856809c9686b40f56a55de9c7372ef9694ff8527ac073159e79879f408b22e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload directories, suggesting an attempt to host malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the presence of numerous suspicious URLs and the high ML score point towards a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 5

  • 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.
  • 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://www.akilciilacdernegi.com/ckfinder/userfiles/files/xiguzebuwefabaviw.pdf In PDF document text
    • https://aviseco.ro/userfiles/file/9660707635.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161184cfe94154---bixamaxizobabeti.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/marubarijifemadivovakas.pdfIn PDF document text
    • https://arerp.kr/data/file///439532475.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/28866907417.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/53673067292.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115bef36b5e1---tedefixabagujepofat.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d58f29283---33108997036.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/43553421021.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/sazofaxuta.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/dotetozapadopatoga.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a3335b5d8b6---24451178982.pdfIn PDF document text
    • http://haai.org/upload/file/27102094813.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/jevonokiv.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/d7d4a2418f532af8c623708926151ab9/nojogesabujefe.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3d5f86724---lonuzikejep.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/18607f12419a10884b3bb6adaac52193/36995107492.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a02bd31f5a5---30185496496.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/vunagoxijunukosi.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826b0ec8425---42539500407.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/kepogazolaxefazokeme.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=panasonic+inverter+microwave+manual+set+clockPDF 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_off0002b121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B121 22004 bytes
SHA-256: 71dbec15df89a902e0252e4eebe39f6ed217ed9438d5fe01bf3dd2f921e6fac4
font_01_sfnt_off0002e9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00030207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30207 10736 bytes
SHA-256: c5d19a2bc4f0385d023cb26c3d77cf52477f3ce4844b5521cc961c75415c8ef1