Malicious PDF — malware analysis report

Static analysis result for SHA-256 56225cb9eb34aefe…

MALICIOUS

PDF

92.4 KB Created: 2021-07-04 02:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 263ec3bc1546996f193232a3a27a0d72 SHA-1: fb9a02563d9c8dbbde2a430a8ae136cf88fef038 SHA-256: 56225cb9eb34aefed865199bae69d47cb88e41c2439bcdfb422f1f08694acf7f
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to potentially compromised websites, suggesting a link farm used for phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure and URL findings point to a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3a115e783---59984785742.pdf In PDF document text
    • http://kawoka.com/userfiles/file/61356557795.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/151aa98792b373041a1310e8eeb0329a/delisa.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/87801824832.pdfIn PDF document text
    • http://amandamaitland.com/images/file/97794698983.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/tbmb2uoun5qnnir501iup3cu7r/vimivexejoxepexukib.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a024f6c5bf---87604953251.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaa913be04---nifebowitila.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/zawegapubukokukup.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/5042d435a93d3006376287557c0e7fe2/tijudesawupagi.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/rowabiliwimenokogup.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/fb2ee46b219cc2f272a23e0a5a0350ea/53629766192.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/7528f30b031a919725de10ca12f79111/13577928652.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210626214219.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/2df313e9094f14f8c954ae9cc7ebb218/wojidi.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d69d34496---78781776147.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210607_395A90746F558C0C.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/98498885347.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/49056521789.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/pirejulopuxa.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/40475782662.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adeb94de424---zavefukoguvekaraderumivom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+close+compatibility+mode+in+excelPDF 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_off000101f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F4 17904 bytes
SHA-256: f612fa130329c6c1ebd211931c441eff3688632e4c03c8f564c9158a62a53bc1
font_01_sfnt_off00013104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001491b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491B 11008 bytes
SHA-256: e8297409e946e7685b7ad97aad8b97de3ed333f8db0d4c83e3d61d453909d245

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