Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9466a3a99443ac…

MALICIOUS

PDF

93.8 KB Created: 2021-09-20 03:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 02f28e0d3c9b3d2f173a7c6020a9b1d2 SHA-1: 7c2d041d74cc6baa66043491db94173950a5d678 SHA-256: dd9466a3a99443ac6d9b6e691c9720c5ca27980004d1a2c6f8b2351dfb246f11
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous links, many of which are hosted on compromised or disposable domains, indicating a malicious intent to redirect users to harmful content. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or trojan distribution vehicle.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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 https://ketchas.ru/uplcv?utm_term=naruto+shippuden+326 PDF link annotation
    • http://dspec-car.com/js/upload/files/7291808997.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/17764632316.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/70535265638.pdfIn PDF document text
    • http://sbkf.org/files/files/wudufonekaxefosafulekusu.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/33817107857.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/82856989222.pdfIn PDF document text
    • http://canadianrockies.info/files/file/14009212624.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/xapanolelozesokegipem.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/8b51767f931b7d1742838e006ffd367b/zodamejajitalasebikuwoni.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/raxinusotosotonokamesitat.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210919015149.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd7515f170---zexozuruzipivanoxevelexum.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/dekusabowijil.pdfIn PDF document text
    • http://honmamon-s.com/img_seminar/userfiles/file/vubuvib.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/67775949119.pdfIn PDF document text
    • http://ambulatorioveterinariovianello.eu/userfiles/files/jeriresi.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/161464334e52f2---68240023620.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/mirubogorega.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/96151821826.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/woduva.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/63163299235.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144a94abb3bf---67124494927.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_off000108cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CF 10980 bytes
SHA-256: 0dce8866372a5d5f3439958f77c1b5a4321539dfc95d84cfcdec46be5a6ac611
font_01_sfnt_off00012258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12258 18504 bytes
SHA-256: b691e97ac052e2d075fba1d8873bbdbd7d66493fba9ef03ea2ebb4939a674c6c
font_02_sfnt_off0001523b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1523B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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