Malicious PDF — malware analysis report

Static analysis result for SHA-256 179dabfc2b0a3e9f…

MALICIOUS

PDF

79.3 KB Created: 2021-09-08 01:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 04127a1966c1169a118b77091ccdbd29 SHA-1: 42424e90aefba959e4f04c93f1e8fd375de85bbc SHA-256: 179dabfc2b0a3e9faaf23defe35e9469ba6bfb6cc4bf5f99eeba7780e34cc256
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links pointing to compromised WordPress upload directories and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=stock+inventory+system+pdf PDF link annotation
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b26114a8d77---sopenalaku.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/nabakevakunizulijusejugi.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbf3a6cfdb---73458156311.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/finojofonujivof.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd230a3745---65309097583.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/xewebu.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/dubodaredep.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/j8aelr4vbbum6pk3kgmlrntmb4/felatekeredunoze.pdfIn PDF document text
    • http://augsburger-dartliga.de/uploads/file/sibabuwiwegunawutodozu.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05b7261e11---masoxem.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/6609192495.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d92376157a5---98978835220.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb0a60d1d4---widemoluvopagujimopobera.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/krkfbsbsr4vbhup9o6qfr696uu/bugisakab.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/rerutof.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d9fbdde3203d8d6a7460606000593b23/tigajusokonomu.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/zuvasuxij.pdfIn PDF document text
    • https://unaizahic.com/Files/files/kogoni.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64960254e7---95576386452.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/83738517135.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e72401edffd---86217314638.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/81267202703.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/4fce2944bfd52590979defdbf818ea8f/xapuvugaxagiz.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/19152386.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///49952176246.pdfIn PDF document text
    • 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_off0000d4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CB 16184 bytes
SHA-256: fa72d19d7808bbe2e6a0284af8dbc0b2a933f7c48285175eb0c7a8e45437bdb3
font_01_sfnt_off0000fe98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE98 10920 bytes
SHA-256: e970055aeb14000934a82a9fdb8a23cb9d58a48ffec64c4c9e396c8447f5cbef
font_02_sfnt_off000117ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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