Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2d9c7560497f96…

MALICIOUS

PDF

86.1 KB Created: 2021-06-26 12:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 526722d46a1bd80db3dee0123fce4c9e SHA-1: 73e8ca07dbaa6b0fb02127c149bb1cd9612887c1 SHA-256: 2b2d9c7560497f961fd3b0c8338c16e14edc826496e963cda496924df7e6466b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of multiple external URIs and link farm heuristics strongly supports its role as a distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/a21969e1b2eecaf479fd359179521691/ponofikezolekiwubog.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/93718671040.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/5ee14b47d0e47f1fd18d8c8bbc4c1ee6/lejupa.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d274e3fb94---55422384438.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f4a7b6648---peregotonixifazimatevadot.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae70c4d6a96---podin.pdf
    • http://hongshengfish.com/uploadfiles/20210508/210508195504149938honzktsi2hz3.pdf
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/sunavoguzi.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/e9009e443948a76875a7937f4148b3ba/95421299451.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c48a68d28---ladiwutole.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/c8bc5b52a0d92db668102ad500dfd211/66492165244.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160791c6f531b7---disanoti.pdf
    • http://brenno-tojestto.pl/userfiles/file/jitive.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/pexomudajepimuduli.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/d7e175926c665c327cc98927b774b016/lamisovuxo.pdf
    • http://burfel.ru/upfiles/files/18185643229.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d562ab27f8---xoras.pdf
    • http://rotang.net/userfiles/file/pasufavuranu.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/r20agd553kac670nfjp5uip3tu/vowowejonufizejines.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846144eee6b---nixolubiwanuzifikeratuwit.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/lajiwirepasupirevik.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609851ddb17a9---60787260344.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607921018f3a1---nupuv.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16073a923992d4---zelopufafevudimajigip.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=i+wish+i+was+there+or+were+there
    • 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_off0000eee4.bin
dbda337a9f60805dc0bbfaa88bf770c9f6b851ef4e39a709709856bcf0de2210		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE4 17496 bytes
font_01_sfnt_off00011c66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C66 16792 bytes
font_02_sfnt_off0001347d.bin
8472bc01d76ed9ca98e5a0207cb6c55a08044dbd40d1a19abf9f66830a5d8e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1347D 10092 bytes

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