Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c06614235e197ca…

MALICIOUS

PDF

94.5 KB Created: 2021-07-26 21:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4fc685f452d308e321094591dbfdeba3 SHA-1: 99fbccb050c56d12e23e12cef75323f22cc1c1f0 SHA-256: 7c06614235e197ca93acc199d522b36e0ba706859ddcf2d219bb6afe70da9740
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of numerous links on disposable hosting and compromised CMS uploads reinforces the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

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 https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6399dc7afe---veveg.pdf In PDF document text
    • http://cissi.it/userfiles/files/46109043801.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc995e9370---79366783083.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/73609414479.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0a0c98dbf---49299880273.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859cae76678---79551019633.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096afbe4508f---fekoxurejule.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d3447b58288062faaa67cb8fca48f6f5/dasopidilamuj.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/855213ebe4255fbfa98c3e156b7bdfe8/92802272292.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/81220672608.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/63574865205.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/a4fcdea411278f834fb74230891ab4f4/60196690457.pdfIn PDF document text
    • http://mayamalay.com/clients/874202/File/79395220820.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3560e5be4---65882868772.pdfIn PDF document text
    • http://sfera-vlad.ru/img/file/salubedenebunofageregi.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/jedotasovinanur.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/4c3663b6781f95501761765c3be890b1/64276652190.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/07536rek719gqauqjb7ga0od0f/dimupazo.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160760cf371b6d---daxabezibebuvinefipabe.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/0fbd02dac7bffc907bee9fde9ce76827/27031456557.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160836f77bf016---wasopiresafexanunepina.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/zosobolazunodapobe.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/zevozigiviraxut.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/4e6a204072aaa8608b542586f94a1454/16963992609.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/2118400052.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/55f4089cdc59c556d1e64a6f9cbf783d/51562206166.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=astm+d4541+pdf+free+downloadPDF 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_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 19232 bytes
SHA-256: 9f4c8a45c6a31c4330451d895cc82353973737e7b282081b7ac1bfb80595fa9e
font_01_sfnt_off0001238f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA6 10896 bytes
SHA-256: 19595f48216dcf3e2db1ea80a90c8a958295365e8469a5794edcba28dea28496
font_03_sfnt_off0001550a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1550A 16456 bytes
SHA-256: f7a171b85b1d7b5ccd66ce4ed726fe4af9ec8f16151739a2615348e7e24cf24c