Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49ba8ead701a4a1…

MALICIOUS

PDF

78.6 KB Created: 2021-06-30 00:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 97ebe5e42318a88b9ea5074c87e7ff79 SHA-1: 4e9f24e981a3392f6f32966c7da1fe0e2f8db8d9 SHA-256: f49ba8ead701a4a19647b9e8543db25ca4ee54211adeb5a4cd0624ea55eb61fe
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 ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://cructi.ru/uplcv?utm_term=example+of+linear+molecules PDF link annotation
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20472d92c2---geruz.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/62505794542.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077fc9bdf7e0---kugepusijibo.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/96970349685.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16085a09af17a7---51082387857.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/58539833290.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/700123d469e98b0aa13bd4da65a28df9/jukepidimolidilatofusisa.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210617_BD8C6B8098D1AA22.pdfIn PDF document text
    • http://soupworld.de/upload/file/57823125175.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fffa475512---77038535898.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a28be6c4208---rarid.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16082159d35328---6635004577.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9739b6be0---66883560045.pdfIn PDF document text
    • http://gyobel.itpublic/file/fitevutedis.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/9394a44ca77fb17accee9348a206f2db/putinadazarulaje.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/29e5ad9c0fa00e541fd67ead5d1d4751/jarenajarulupojufatot.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/77165423241.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c671d7f1f44---3147698576.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/71f6a724b14153a8b252a34d096a2b9e/sipiv.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/8r1hjln7q7225quikmluplf85k/gamowoboxap.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77a2ea9853---lurukibosebuxuligonezu.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/65ad906003160556728e472f16cee010/wuwidenipirolizasok.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-13/20210613114515617142.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_off0000cc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC82 18420 bytes
SHA-256: 882183b97a7bcd0c6bf3f706aab6a5994a84a3475055685f9ba9a6c68c5af763
font_01_sfnt_off0000fca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BE 10728 bytes
SHA-256: 058e48472e4dacdc7a185c3d9221c7d6e7841a10ac516eeff5ef4b2d1f747cb0

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