Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7602d693ee9643…

MALICIOUS

PDF

75.2 KB Created: 2021-06-30 19:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec366e5166792f68ca6f58ed2ec26873 SHA-1: 9f83933f491eca431a0cd65c9939ceade347985c SHA-256: 8b7602d693ee96432271d71c15b312a6f13918e381f677846cff17498c9e52c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The presence of multiple external URIs and the overall structure suggest it's intended as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://php-lounge.de/userfiles/file/milikijaligajo.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160772cab8ffd8---nolodelujiduvizemegafom.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad1229d74d---66497620236.pdf
    • https://kmkmekanik.com/upload/ckfinder/files/13520409927.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a10b971cea---3574063945.pdf
    • http://happyland-nsk.net/ckfinder/userfiles/files/xilitulejozereta.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608761b44a4ff.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/124bc480293df6e80c8d0887f9d17028/97591054598.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c8c2912da---38525481115.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075eac93ee19---judajibiditexokole.pdf
    • https://kodcomputers.ro/2664/uploads/mefunobolibomazovabunuzo.pdf
    • https://aawyx.com/sites/default/imageuser/file/55233099612.pdf
    • https://aljazeerahpetroleum.ae/userfiles/files/pubemukimozoz.pdf
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/50218764975.pdf
    • http://faw-asia.com/image/upload/files/52942118934.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/5d6103fd3f41fa52c7b26ef865205517/64373668804.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4de11f50f---43472161985.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/pm83lr0fg4ooch93sh051c143p/59669734701.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b9aec157b---40567421225.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/salfhcrees1elb5spqo8nq71b0/mururufemulasuxilalikam.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072623bb8518---34032069155.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095b64d2b1f2---bexoreroko.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c63ea7dec9a---93826152262.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160860d68c361f---95171737557.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/jivuribuderepinin.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/fghbferqjj9loh14neak6mldgi/63007734857.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=analog+and+digital+electronics+objective+questions+and+answers+pdf
    • 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_off0000c000.bin
70877cdabe60448347742e9c8dea6ec3c80deb8d162b3d42ec733706bfbfdad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC000 16904 bytes
font_01_sfnt_off0000ec33.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC33 16792 bytes
font_02_sfnt_off0001044a.bin
8bfb7433d2e276102b4bf786ff8ed875bebf699d713f53bc4b993a971aab9669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 11444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.