Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a8d273b2ee2d0f…

MALICIOUS

PDF

70.9 KB Created: 2021-10-01 00:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e02b1d1b6977eac9991e804fbbf5079b SHA-1: edcbf8e29a946f26800b5fd4008a0ed332c3d3b0 SHA-256: 30a8d273b2ee2d0f9be5eb38950265a52082a30137a3fcba821113b5464a49cd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains JavaScript, a common technique for executing malicious actions within documents. The presence of numerous URLs, many pointing to compromised or disposable hosting, suggests a link farm designed to redirect users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://thehedgerowchronicles.com/ckfinder/userfiles/files/fanafudigogekaxite.pdf In PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615008ce0b13f---16322369508.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/jejegofalik.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/vexesokesanerarez.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/81000340985.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16135ba2175ae8---13684476575.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469aafbcac2---79584597187.pdfIn PDF document text
    • http://gosapahostel.com/userfiles/file/jesemedinesakofu.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///rejenogituzakitofokugefaj.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/girotewuwobenedolut.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/govopopofojaxorojevox.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/sesafiselozabifi.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/vasifanemibi.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/21182132112.pdfIn PDF document text
    • http://vhshf.de/File/mesikatosuf.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/8921c512c53902f31b8366e57c03cfef/mosiji.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109251149404717.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/velawewikoxof.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/86700673842.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161544ca3137b2---rirozokodolilen.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/mozatebexazi.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/davadabimomarinebitunuw.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/nejilulomejoki.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/melopolotewev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=xiaomi+note+8+pro+custom+romPDF 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_off0000b3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE5 15964 bytes
SHA-256: b5fe7c0b87c3c50fb87a8c7ace41af53d757183f38a364bcd2217159888799fb
font_02_sfnt_off0000f4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 10804 bytes
SHA-256: 2ce663b54d849bb5d37c8ea9d5a0a812f046933bde76465d8fa52cbc51f679f7

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