Malicious PDF — malware analysis report

Static analysis result for SHA-256 13de7d736c447bf6…

MALICIOUS

PDF

90.3 KB Created: 2021-08-30 04:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 426831d309a9f08c1a0c919dd31b9435 SHA-1: 76a6b63a8fdc0e83dd43a2e951797508280df0d8 SHA-256: 13de7d736c447bf6cf5874e4e10f08a390a2be166d8039efe8e67e3ad0837490
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated maliciousness. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, forming a link farm. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://rewitex.pl/userfiles/file/30291720914.pdf In PDF document text
    • http://banghaija.com/userfiles/file/80999095868.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070e9904d145---pumugukifozolixarukuwa.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/79887059391.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/dupugubuxojemixufukifafi.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/gekaxo.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/diviverek.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/bopiwebezodugefujumepal.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/bonura.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/bujunijowunufunopavowe.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/munelobemovo.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a5f3d3aa0---44372706671.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/88390630630.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/milafogurizejape.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f6ecc861e657341a5f4a67bfe946b6d3/30990987053.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/oonainkb2gg6hpsk2gvihrgnh2/giziretojodijakagapemiga.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/9a6s3u5srneia0n94q75338t7j/40640058877.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/933eb3d161045efc817ad46ee2e66784/14708728398.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/jitefegagoditidewenevale.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/fb570832b596b7294fac63f097ba6fec/gamokububokema.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/76868069637.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a354b336e7c---naxebufajej.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/annqt2m8kt9sdb7i6gcu5b27kq/29849432032.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/vepopuxegonakipuzasoduf.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/67157669049.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/18227978084.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=bubble+tanks+arena+hackedPDF 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_off0000f78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78C 19212 bytes
SHA-256: 94bd4284b91d919443f6467812769434d5db8d743d1a18032766980117f5e0a2
font_01_sfnt_off000129cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E2 10640 bytes
SHA-256: 8c28439a0ccc3bc188c9ffc39d4167e1ffe659943b47485a527a9d2727cca698

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