Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eab24f3499d4455…

MALICIOUS

PDF

91.8 KB Created: 2021-09-08 12:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a4e18389b33e5b87669e3cd1e1416a89 SHA-1: 430485c8641e5198deff812c70935fc4dc2e0f08 SHA-256: 0eab24f3499d44556e245816f4879ea8dc234a9b512c003d598d2fedb5bec612
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The file's structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • 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://mispuntossaga.com/campannas/file/kigewajezupivusebogosusi.pdf In PDF document text
    • https://pui-vital.ro/msg_media/file/19512763923.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210817060449.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/18i785oin0qul9db3k4gslevk4/99666558210.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ee564da2977---relodoxo.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089b308c151e---32057298305.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/sukebum.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/84769813396.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/99154400179.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/89211866747.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/bijibasokuxoriligites.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/035b1cc1ffab538d7367397b5e84c2e3/37111633604.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210824061605.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/76968877755.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/tikisov.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/xosasil.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/powapeviribo.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/783ou1b3q4ddepgaafrte2u0lh/lubujogesozoki.pdfIn PDF document text
    • http://jinyezi.cn/upload/milofof.pdfIn PDF document text
    • https://nicosiacaffe.it/file/95236150352.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8d928b624---koguduta.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098d6a9beb25---10418017558.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/bfefe021b5ec133084945f4b2932ee2f/nigadekazix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ias+33+earnings+per+share+pdfPDF 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_off0001050c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050C 17216 bytes
SHA-256: 80ffc49cc4dfb80f3b039658182409c14c42dedd442b32dc4d42f875bdbb7ba8
font_01_sfnt_off0001316b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14982 10636 bytes
SHA-256: dc8ee4963d443835b54191243663cf1beebe7707fdb7c7b5d50f549f5dab5d8e