Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f12058e3f5f8e8…

MALICIOUS

PDF

97.0 KB Created: 2021-07-30 17:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04033dfe80aad7c1e4457de4bbf8548e SHA-1: 5ef50e8bcc204939e5b2f7a8d471d8794b7591b7 SHA-256: 03f12058e3f5f8e843510ecd34e7e186afd3dd9caaa0cfeadf2cea9e63cfc845
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using disposable or compromised hosting for link farms. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://residencecarlofelice.com/userfiles/files/36000260984.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711d94ce52f---wufevukerozusanigigamep.pdf
    • https://cafemocion.com/userfiles/file/19331386427.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16084f989f2641---zigaloxavetafu.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/2a23e8a8a4e75f260449f1ee40026463/91696355760.pdf
    • http://unityproductions.com/upload/files/79866365500.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f15ce7e712---99865443339.pdf
    • http://cesishotel.lv/res/wysiwyg/file/lifafalefubodalewenu.pdf
    • https://stdtekstil.com/upload/ckfinder/files/36300362125.pdf
    • http://studiotecnicobergamaschi.it/userfiles/files/rijikiwigubefibufasewul.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/38dd1a31ad200e41645aad9c6dc26713/lazomerajonitos.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/f48ef629e787b9d909089a2c01f50bcf/kugesemupes.pdf
    • http://jaika.in/images/documents/files/xepibibupin.pdf
    • http://botosani.ro/img/uploads/file/55781265603.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c74739e6f81---67281294372.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/14ca5413cd7bee0032af832492916edb/zavawirazawowezanepuveja.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a776deb1bb6---22409290430.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/aa38f2268bb79c5b2f30b5a247b46515/10805696540.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e7d78aa75e1077be50768a27b359dde2/risoletixobu.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/bbf150f2dcbcd285fe952685750a42c9/sofamotolinufituvedijo.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc42367c439---5974877939.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/9de459a0a80f5953cc070d74e8c6b995/62903866584.pdf
    • http://beergolfers.com./blog/images/file/guxunevususapusuforidu.pdf
    • https://daaeportrett.no/upload/file/didujebobenonafew.pdf
    • http://dfh-consulting.com/userfiles/file/52595916749.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/besonaf.pdf
    • http://fmi.lu/userfiles/files/66879126038.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+play+breath+of+the+wild+on+switch
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9A 16792 bytes
font_01_sfnt_off000125a7.bin
e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125A7 1636 bytes
font_02_sfnt_off00012d79.bin
1cca95092f1aada2ff84a8bcf0532d712e5e07f60eb5d16f1b3e7e623ef67197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D79 11048 bytes
font_03_sfnt_off000146f4.bin
83019488926a49b07b780727b2e41c5c48576ce0db76d1cf0f1202d11eb28b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146F4 17508 bytes

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