Malicious PDF — malware analysis report

Static analysis result for SHA-256 982515e567236c5d…

MALICIOUS

PDF

108.5 KB Created: 2021-08-22 00:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f756552df81854732514f95b641502ae SHA-1: 052817181f339e7be6134c86babf57f886b3252e SHA-256: 982515e567236c5d00416669ec416a4cb30a50da5f0e7f8c4338af042bbc5045
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9445

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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29512e66e7---4259568458.pdf In PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe2497a9d4---wosikukepimiviwaguzokoz.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/nutazodajaladaxo.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/66840680241.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a3b63f69e---17867678218.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119115e871d5---28450256183.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3d973bd1c---69354122694.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d054804b9e---sudorimawolubedegofe.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda5bc1ab1d---vofemabekuduluzisunowa.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210810074616936139ymzrgd.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb7871d635---rokudetulatezoposikadiv.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kidufosinujiruteduzukolor.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/r3eq2h9a42aamjm4vme8trlr73/39791501465.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb63608824---vikojataleke.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/55263441285.pdfIn PDF document text
    • http://mcutech.net/files/xugezewuxejepeboma.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/gawunilas.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161105df328d78---jejemepimuz.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/vexobumuduzome.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/kedalalabujafomoz.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb40b7f1fa---17746872351.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/42a513677490822b24bb6482fddcb039/72672219492.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b55ce97723---35841565643.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/80755803100.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/22244081829.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/df3380ec0a5514f6579c3345ea671e15/86654655611.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=list+of+ehsaas+program+payment+centers+in+sargodhaPDF 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_off00012208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12208 18372 bytes
SHA-256: 237c2c7d29ea74b2fce4b72c15466906a5fb7db68fe7c0fc0a615a8630db6dac
font_01_sfnt_off00015296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15296 11092 bytes
SHA-256: c09231d65f8cbf23b9eb0ee05830ee88d2f6d87ce6bacc15b70a4e66a3e53f04
font_02_sfnt_off00016c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00018433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18433 17996 bytes
SHA-256: 48a58ea4087058113e32eb7543f2d1edc44b15175e6e192ad5fa86da2c896683