Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcaa37d84ad5121f…

MALICIOUS

PDF

114.5 KB Created: 2021-07-07 15:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fc37fa8851d56c49debd9f00b5742c2f SHA-1: bcc46774f93a6f94f3891702a91a2bacce9c93d9 SHA-256: bcaa37d84ad5121fa6a0e32a8ca6c68f19bf9d69fb6266330526c815a7060c33
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure and numerous external links are consistent with a malicious link farm designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://orvosvalaszto.hu/uploads/files/52510317387.pdf In PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/273be2d6fb3f7fba67b6dffeda3f2760/90372746018.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/73801290621.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b289bc8176---24251115511.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/a5ca1d2f37c8421de39b80923f4008c7/7829554847.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/38cb38568d05cd75b3d3bd1bbe8b15e5/dadotebaket.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608f25722b790---wononolifazosemavapem.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c22fce83bcf---nixopadodekepi.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/31c170cqvph5q3jv80tqkd920l/vojus.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ee2f38b42---4204102705.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/6ic34oleurh7do4mleqt0i1fm6/fagowepakutekoj.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/jibofuvuxomuzinad.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/44654905391.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/karasonojaladotobil.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/5a5d1e4ac777a71bfd33bf77a6c22d93/belamatalawezoduraxev.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/49522085fb3ed39106f0b23a79cc4c60/80738485547.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160790fb67dae0---33170633162.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964257a9191---xaginalunozadamalo.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/15672386917.pdfIn PDF document text
    • http://billsky.ee/files/file/66564625368.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a5763232f---basebabivijixa.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/f3c957098e9c0b7e8a7cd51058177a95/jadosejixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+significance+of+the+number+17PDF 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_off00015eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ECA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000176e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176E1 11044 bytes
SHA-256: 18cf2acaa3149fd67c52687844ea892ca599b8f5073d423d1f8bbc3990220a41
font_02_sfnt_off00019086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19086 17056 bytes
SHA-256: 9f868d7ff27654273ae7ba9f720ea0820174aa6fec7ff9e1879d8e1440c39438

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