Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ffd1e5112f01b0…

MALICIOUS

PDF

98.8 KB Created: 2021-06-27 06:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1888f8e3a92902c6368dd421e04088d SHA-1: 18af90862b6298f1baa07da6497fb135f61c7f1a SHA-256: d5ffd1e5112f01b0e95f49b3106520b7e9eee481c61e7ce055422a2316b79ecd
196 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, exhibiting characteristics of a phishing and malware distribution lure. The document contains a link farm hosted on compromised websites, directing users to download PDF files that likely prompt further malicious actions, such as installing browser extensions or updates. The presence of multiple compromised CMS upload links and SEO-optimized disposable link farms suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/6l05041v0t0l1j024i3vnr262i/85297587652.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/9hg5klhldv0dg59j9de79tk2tk/ropuritojiwi.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3a55131afb229052a5e859e39c6059a/27554589352.pdf
    • https://murtenhof.ch/userfiles/files/wobopugusugepu.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756b95761ef---dabukuv.pdf
    • http://marty-triple-m.ch/inhalt/files/20290883014.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/608e70ucs679jujb8mm1ud2env/fosokepo.pdf
    • https://delaneyllc.com/ckfinder/userfiles/files/repirivikajutijulidozaza.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/o3kf7coa2vpck1q1jfbd4gh2q2/17484673751.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607699d585810---sazudovenon.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f0de231da---ralulilalelonoru.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1aa844c25---mojotanoromat.pdf
    • https://pakistanchristiancongress.org/userfiles/file/fudokamovelurigako.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a711cc4d565---24465320324.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c52d70ea925---zigegasebuf.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dd18809a7---99805112759.pdf
    • http://parmalab.it/userfiles/files/datogexuwazax.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/00h5eea89ju8e1b46s4fit5nl4/75851242488.pdf
    • https://jamurgoreng.net/contents//files/37844568667.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/f32e59c50e9e3bcbff268c9d24cff8a6/zususokexotaputedejavuvi.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/s8m1c98unntdojorse7c8k4hj4/64794916502.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/121f5ccb07f92ebf55c74dc29de7095a/rexuvukodebogovakuj.pdf
    • http://fobosgrunt.ru/files/ckfinder/files/zulosomuzubizibugokiz.pdf
    • http://ligneus.hu/upload/file/niganigulitezuzuviwuta.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160796033ecd36---71958569606.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608829ed24f44---razewo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=themes+in+oedipus
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfe6287509---gewomofepa.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_off00012382.bin
1d246fba594de38e53e2e5ebc2da621cdd012df66950de5e09d68d8cf214244c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12382 10312 bytes
font_01_sfnt_off00013a81.bin
83d911af3e35b204504220054c7104f929bdbf3e8a7820771b566b02e1495800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A81 16948 bytes
font_02_sfnt_off00016615.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16615 16792 bytes

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