Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0965791eb39c441…

MALICIOUS

PDF

83.5 KB Created: 2021-08-02 22:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d1e3b90b26c427a17284d0f6da7683d3 SHA-1: 2d2696a4f81aae40f49ac0cd3a1c4a8d98c69adc SHA-256: d0965791eb39c441c40289abe523f49830add417bedcd3ca03c90dbf6d8f9053
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e3e37c769---76403482772.pdf In PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d386a5c767f---bubusek.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/6222792053.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/d2fde57e1531582bd56f7a716c69d52d/68031032358.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942b576f37d---xovelariwabume.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/3vn8u2oqf63e0cps3h680oui2p/tipozadoneditewazemunoded.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/78886738805.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/zixowuligarase.pdfIn PDF document text
    • http://atonoserver.com/userfiles/file/bojifuvifekurubi.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/129221c1e5c42cd25bb40fa107b5d550/sebegukaletirejajewunano.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820c9d2d758---87318899004.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abac4984920---zonowasomizakulike.pdfIn PDF document text
    • https://tantecoccole016.it/file/polixisumuv.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/4546072045.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a78b9c2d087333f95144bece0c7ea5e2/momajikerafomisazutupa.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/jopewixawe.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/56c28c3fbf71c8beafbcbd5518ec645b/mogosowuro.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800c9f65ac5---42417966846.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b074b1153c4---xinakagokapitop.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/kiterevuzegazovuse.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160821db47e09d---muxuvematidororenuror.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7e451f5a1---tuditatevaxogexeze.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/656aca47882a4d3f4374713f77f9d3cf/gizukirolegugofijonuj.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xukolodexufiwesexegut.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/21070654923.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/f2nbhec4ekret8c5t1n8e00aig/donutabatudevixeleg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=introductory+biomechanics+from+cells+to+organisms+solutions+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 11372 bytes
SHA-256: 1cb52526264dd4198460667c85f8ea506bebe47a7bb4479152fb38ec7e0f78b5
font_02_sfnt_off0000ff31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF31 16480 bytes
SHA-256: 723c4fa42834285dc133575a930d89223db267bdddb45eb94919f5c582ba20c5
font_03_sfnt_off000129fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FB 16084 bytes
SHA-256: a79c9caf7d9fe7d7e6557dd08284a48a0650ee9668136fadcfdab94fba17ddb2

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