Malicious PDF — malware analysis report

Static analysis result for SHA-256 361d854aacf5813f…

MALICIOUS

PDF

140.2 KB Created: 2021-09-06 03:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e4dde4507022e387372f13ef8ce02a81 SHA-1: e93e88b1e922c75f458272bc242222bbd11f0c8e SHA-256: 361d854aacf5813f99f6dfdd4f26953f2248b26723b89ece125e120f80a86c64
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://zulaikhatextile.com/userfiles/files/fusuxoj.pdf In PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607e107e84b80---39839850312.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/femogakanuzikomodite.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/sajedeb.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/63fb03c179d2810897fc341182ae8685/dofutekemobejatu.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/jutotinu.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609281cf38a73---6908842467.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/35179660974.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/nupurid.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dc3cb575b---kigelalomum.pdfIn PDF document text
    • https://tl-systems.hu/files/files/savesiwolonovi.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/9d51d461af7668061ce4b31aa576c652/94098279903.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160afc32b25f54---24684423518.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/fecd29ebe6b95b0bbaff71a7b5361881/26120979457.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/17a1e31b0a4c7d2010269e1984d4aafb/tulujamaj.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/waxuxibelasunisos.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/17465445277.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/60476633528.pdfIn PDF document text
    • http://cochemical.com/upload/files/24124170831.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c892e7b7b0---37335553321.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b74e3eec72f---xufewit.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/vukopaze.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/folj4jun7kgv9c9k6g84fkjsgv/zukipoxazajo.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096ad4242a77---tosilumegapokuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ariston+hotpoint+masina+de+spalat+manualPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/903b76e60f78ad9c3977136a7aaaa007/jomapenasawukupov.pdfIn PDF document text
    • 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_off0001b46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B46C 24464 bytes
SHA-256: e5abf53aaeac921b750ae66f172816f467fa8762d053b54ccd53e7ce7cb8b320
font_01_sfnt_off0001f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F206 10736 bytes
SHA-256: 15ed77f4e40c469fb49df91e49531b988fdbb8cf1f991cbef5d12366d2797018
font_02_sfnt_off00020a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.