Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffe401169150e3e…

MALICIOUS

PDF

86.4 KB Created: 2021-07-06 03:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: de5190ef3ac15b083b461a0ca677cb4a SHA-1: 6e0c5cdc279bb9a949bd1201874050044ec203a9 SHA-256: 0ffe401169150e3e06df2cd90c5d3fa903763ea8fd2a5102a783ecbd164af2b3
72 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or appear to be part of a link farm hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such links, likely to manipulate search engine rankings or distribute malicious content. No scripts were extracted, and the document body was unreadable, but the presence of many external links suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0074

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://chinajessie.com/seadata/data/uploads/img/file/162374603181.pdf In PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab9fee1416---fekujetomet.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/67469478902.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa056d8ef4---55777905220.pdfIn PDF document text
    • http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/dixij.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/8914669442.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7b81daf47---36665143246.pdfIn PDF document text
    • http://abwessex.com/uploads/files/37805935544.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/verajizuwerog.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/14891075742.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/titasiw.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a248b6cd4452ebd0f22cf51a08a1eac2/23319232017.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c46bed413---vetonufurazujeso.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/aabbdsl16pihq13dv074epnnc1/kewidepubotufe.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a98ae70e558---19367877792.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c099a150300---rimanuvuputafulowet.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d75a3290482---81971293532.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/93537047659.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608841486865c---19073825189.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b067a699d3e---dizufelexi.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/63377749862.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc9dee7ce7---70779520210.pdfIn PDF document text
    • http://godswaynehemiahmbc.com/clients/878002/File/bemarimonaziximake.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609b15136b77d---89559939768.pdfIn PDF document text
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/meruxodimexag.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/6rbjgc309ai52ig66f449qmrgc/85700594369.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/30bqpkujfsaaiea8sq5qhqfv4t/pajuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=in+spite+of+is+an+example+ofPDF link annotation
    • 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_off0000f52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3F 18616 bytes
SHA-256: 56f61748379464f30b7cedb2f3844f880680b10b319a80e3f6dff0d86d18841d
font_02_sfnt_off00013d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D50 10472 bytes
SHA-256: 6b426408d4ac0e6ffb0940ca3caf7162ffbfdb468895d1f49fee809d27f903fe

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