Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d36fc0c5b912c1…

MALICIOUS

PDF

76.4 KB Created: 2021-09-06 19:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4b75ddd85dde7d84bdca5139cb70b988 SHA-1: e5281d47822849085569b94cdbc46601017095f2 SHA-256: 02d36fc0c5b912c199c6dd0cd56e11053405053699ddde08e8b2497cafcbed4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a link farm, with numerous embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves luring users to click on these links, which are designed to lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://brawlcall.jordanadams.com/ckfinder/userfiles/files/ginegakokezamif.pdf In PDF document text
    • http://gelikonline.ru/content/Files/70464675959.pdfIn PDF document text
    • https://phr4u.com/files/27762187871.pdfIn PDF document text
    • http://prosquash.by/data/85064509224.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/93535710954.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/83198983616.pdfIn PDF document text
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/rukurido.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/75f6253a88bb7fc8359c286ca7ea5c38/15691779432.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857b8944b6a---74412219268.pdfIn PDF document text
    • http://poiskvod.ru/images/file/vetoxinoverukitumin.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160754f8ec7081---45815397779.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/031761649c8bffeebc654728390b470b/mumazim.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/kivotemivekibopubo.pdfIn PDF document text
    • http://www.celso.org/download/borefokofenosowuku.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/eae1c8e2a57f4779acb9aba7a01fca5b/3035016522.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef70dce118---vizixetudo.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/dee4a9147b345824fa90ee197e83859a/42452877677.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/23b3dd727fc68fb88a9b3626e9e24ef4/ramilezoximezi.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/mometanujoxuvekipanunix.pdfIn PDF document text
    • https://parc-hotel.info/file/folorulukakuluzosi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/436679552044fef11e5c5b97c5474589/77927232055.pdfIn PDF document text
    • http://retailcop.ca/files/poniwupewedukabige.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/74450165229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=earned+value+management+handbook+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC728 11068 bytes
SHA-256: 36ccc2ba032a4b488f96004ce71dcc19e05dbae5944098f778fe040a8576e49f
font_01_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 16948 bytes
SHA-256: dba45a14e48de3e442168ece888dca8d7e7b1cc58ff9753e2aedf14db8aecff9
font_02_sfnt_off00010b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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