Malicious PDF — malware analysis report

Static analysis result for SHA-256 e225d3f7d5378283…

MALICIOUS

PDF

82.3 KB Created: 2021-08-18 08:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: c455a19f1b45599881fb88883a3ba4de SHA-1: ff3cc8e39ec3cebe7e4111f6ca642659fc959987 SHA-256: e225d3f7d537828300fa176c584fe34bfdfdb8d1577ae2448728e7a82569c95c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains a link farm pointing to compromised CMS upload directories, suggesting an attempt to host and distribute malicious files. While no scripts were explicitly extracted, the presence of numerous external links and the 'Download Button' heuristic indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dbc3bb7ea2---vajudolizowudabekudepexa.pdf In PDF document text
    • https://usssecuritate.ro/userfiles/file/5929100051.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/pojusefiralinunek.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/naxidomulinimejilalegi.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/seratupazotesapi.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16108e72913d9a---13415327513.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/nejemefitaw.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e99d519c0---rofajebig.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202108142057033620.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29b6bba67---93994813600.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/67881564938.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/63113452117.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/26172881106.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/xotexoxufejovu.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/welujurebixowonukidukeb.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/81156894608.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/nawujoxerodexun.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e920439efd---tuvedadememesok.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/gubuziwevurupimagupuwadup.pdfIn PDF document text
    • http://ausafe.net/images/art/files/boviboseg.pdfIn PDF document text
    • http://contactconfiance.com/files/files/23903910170.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/xuladofifavasapenisina.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/milibudikazodebuwakej.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094cbf734b50---jesalamaz.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/xakibirotajogukos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+use+keygen+for+autocad+2020PDF 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_off0000de1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1F 16496 bytes
SHA-256: 2581a86810e7f7fda3194b0f4c817bdf43c33b0331a378011dca6e7e906775fc
font_01_sfnt_off000108e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FD 11140 bytes
SHA-256: 859542721744a0c78c7422a7851f5551a7c4e62d5979a04b8f226cefe5510fb6

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