Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcecaf35c5edadc8…

MALICIOUS

PDF

85.1 KB Created: 2021-09-01 10:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9dd0685655423b404a8dc1558df29387 SHA-1: 0f58564d917a7dde1d50019ad5d247bdbba7378e SHA-256: fcecaf35c5edadc8be79d0e66c95e641415c63ed2becec383dfec8e1cefcf65d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, hosting numerous URLs that point to potentially compromised WordPress upload directories or disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://kantoromega.pl/userfiles/file/figozotaxofazopubo.pdf In PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16125c35535f60---26420649065.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13270709660.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/zalomoxijuro.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/nutviv7uqpatkk6g0gbj33jjke/56639478583.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee64af0d1e---derifiwununusideju.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/72690003381.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/ckfvntlrp4frd69t0slrecbl35/talufurufobopexibabevabib.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/mukiwonasijejedepixeweke.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/laolg67hqu6rfm43o5i27qljn8/84513795178.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/56819430970.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161219707c3e86---26479571483.pdfIn PDF document text
    • https://anakaygame.net/calisma2/files/uploads/73792910492.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/2674dabdef06a58bfffd3845a9c4d7a7/dugivekotijigepotaxurit.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb09c7c7f5---20602939376.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e97170ce1---wokibarovifu.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/manakerumirafegad.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/65e12e9c3c4bb76499e70cc1abc11a31/voderibipupejanewerasin.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/8914245314.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/tumigasewudusanojov.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/zafezaw.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/bivonemoxuxorix.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/15761434640.pdfIn PDF document text
    • http://smeclassof1987reunion.com/clients/37165/File/raduvudoxenirukixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=can+i+get+fired+for+no+call+no+showPDF 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_off0000e97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97E 10872 bytes
SHA-256: 8172880367d736e9bae89f4f5946cbdc90b4c5db955f28e33d37a093ee21d8d6
font_01_sfnt_off00010271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 17212 bytes
SHA-256: 42ec37637ac14af502b7c52e0d13472171a6b9f891b9777bd05357a08f23722a
font_02_sfnt_off00012ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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