Malicious PDF — malware analysis report

Static analysis result for SHA-256 030cdba04ba43154…

MALICIOUS

PDF

79.4 KB Created: 2021-09-19 02:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8a0a4c52dde40bc1367d2240c6d78ad5 SHA-1: 8581650dcd9e3e8f8e9e7fddc3fd543671a86231 SHA-256: 030cdba04ba4315459939b273b98e98b668ee5a6f33a651395ac50753ba5f331
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to external sites, including those hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The PDF structure and embedded links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://arredamentoambienti.it/img/file/87591894952.pdf In PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/zisuriwedazobud.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/36437398541.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/taxumotudalos.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/bedutixurasado.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/nudovazikazufazoperuwava.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/tobarazove.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/xakexova.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/sopironazujuliwezi.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/1973069c90165fa2fd4c3be557745e52/66653865581.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/82837131881.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/kofegobumatawewexitexe.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210916_093718.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/97979390922.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/xigerizovawavig.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/343c08dccf3ddad10a4550c1b84d4669/dapabilifiri.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/vasemunadejepu.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/gejupebeduribojabipija.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/gejamazolefivanit.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/fulupi.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/76538330137.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/95420480417.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/02ea594n9p8i219qbcenudr2o5/28298993985.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+long+can+frozen+chicken+sit+out+at+room+temperaturePDF link annotation
    • 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_off0000d0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FF 17060 bytes
SHA-256: 2418dd1fae3e0452f7c693a9e53b19138a540c7df0054e8c53e85577fd239292
font_01_sfnt_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 11256 bytes
SHA-256: 7892708c7140d36a82f2847b6f0378ca1a1e6693fbfc2aef0d62011b4853d03b
font_02_sfnt_off00011743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11743 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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