Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bb6bb252bf15d8…

MALICIOUS

PDF

82.1 KB Created: 2021-09-10 00:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 999e393b88ff92dd254d87febe84389c SHA-1: a220d219e28a8218b44cc99a0fa7b82beb6a5a16 SHA-256: 93bb6bb252bf15d859933e82e95c58b98aa882d9536f9a657979a4478752690d
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The sample is a PDF containing embedded JavaScript and a large number of links, many pointing to compromised WordPress sites or disposable hosting. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users into paying fees for a fake prize or parcel. The embedded JavaScript likely facilitates the redirection to malicious URLs or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://magdrywall.com/project-new/christianbook/upload_images/file/futefoneripuda.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa832bd849---befubamivebu.pdf
    • http://afslab.asia/upload/files/72546151526.pdf
    • https://sadhankendra.org/erc/media/37448617297.pdf
    • http://vatlieulamnha.com/media/ftp/file/kagetimoxa.pdf
    • http://morecoredesign.com/images/imageUps/files/76330079706.pdf
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/37224765777.pdf
    • http://resetimpianti.it/reset/public/file/50216492295.pdf
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/65219564312.pdf
    • http://skontrolsengineering.com/file_media/file_image/file/finarejub.pdf
    • https://cuatudongbinhduong.net/uploads/files/mejabagefoxuximemusunitik.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/41f69cdf550ad6c5d1d19e078719b268/23196566818.pdf
    • http://uniradioweb.info/userfiles/file/manotunijanijilujawutizes.pdf
    • http://esistore.be/userfiles/file/ruwerutifamamabimulelu.pdf
    • http://pcccphucvinh.com/upload/files/kebomajufenufajajufipux.pdf
    • http://bptramptour.pl/files/file/23487379282.pdf
    • https://masini-de-ambalat.ro/images/userfiles/81057059232.pdf
    • http://wangguanhardware.com/userfiles/file/fufisurizepulinuva.pdf
    • http://csc-0898.com/userfiles/file/20210910021107_2acby1.pdf
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/pegeduwe.pdf
    • http://miyozenemeryville.com/uploads/files/42090008841.pdf
    • http://www.enredmail.com/templates/files/idCliente_/file/rusut.pdf
    • https://cottonweb.net/userfiles/file/rufuxutazetozititanutos.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/069e4f6d590b375ebfaa267b0df416e8/83973697574.pdf
    • https://dragonexpressml.com/userfiles/files/42767272220.pdf
    • https://www.alitec.es/js/ckfinder/userfiles/files/bobamopoxid.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312733bc7e9---wapokomulodedoxe.pdf
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/29734421211.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=gta+san+andreas+mod+lite
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d733.bin
7aa6022c9882f3480eca3ef2904f29a5a6f384bac0e71156fed1d38fbe203327		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD733 19556 bytes
font_01_sfnt_off00010ada.bin
fd19c516d2cc5b3a9b950517fc4b918020e947108e67fbe2737aa1e0e9b6d4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADA 10448 bytes
font_02_sfnt_off0001228b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1228B 16792 bytes

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