Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9d345833e0a78a…

MALICIOUS

PDF

88.8 KB Created: 2021-09-02 16:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e1ebaab6f95f12e314909d02074f8e93 SHA-1: 9b9f274f8177b1adb2292ceb23c18d0176fb7bce SHA-256: 1c9d345833e0a78a30ec0c00c20a9749cd403354d0072ae5c0d8490dea68fc32
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating it's a Pdf.Phishing.Trojan. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised CMS platforms or disposable domains. This suggests an attempt to lure users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://sillajen.com/fckeditor/_upload/file/mizuxaw.pdf In PDF document text
    • https://0a3exp.com/upfiles/editor/files/vanutisesozuvojuxifiju.pdfIn PDF document text
    • http://runningrhinelanderrabbitry.com/clients/875187/File/pawobiborububupibevanos.pdfIn PDF document text
    • http://builderall.info/userfiles/file/6372459747.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/vinerudejixexonepuzudaj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e959047f474---12225956502.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/90403524781.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/tasalotojeki.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a24221eb4---nugamafugebideburuso.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c304cb93abf---gebojoweso.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/depeg.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/lodivurugiguto.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/161030615836b3---58743754155.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/1829a9cf57a20cfc19289543c77efbfa/nemas.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/d5a2065b016ba1a23e82ffb51dfddb3c/57619303839.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cdc0abedebb6edbf2582048dd8aaf35/foxipi.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/kagakixidugakaketapav.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/15102184381.pdfIn PDF document text
    • http://remobudostol.pl/pliki/76278527700.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/zokitelidubirujatuxitexo.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/jgmuncto445m5gmmlh74kfj8k0/sulexal.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/lefixoziramumuwajuj.pdfIn PDF document text
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/7142676465.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b8f28c06d---lotofarubulupi.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/gidoguzuginukewomilon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=donor+darah+menurut+islam+pdfPDF 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_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 22444 bytes
SHA-256: 2cb340f5288f141319b01e8b029ec1bbc814d275b91d4437b75184c16e831c1e
font_01_sfnt_off0001246e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246E 10864 bytes
SHA-256: f268e9375e3acc8a344e6579843ec9f270d9ad84f0fe5486e6aca587ecf6d85a
font_02_sfnt_off00013d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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