Malicious PDF — malware analysis report

Static analysis result for SHA-256 67342757862e9615…

MALICIOUS

PDF

69.9 KB Created: 2021-10-06 06:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b8dec13875018b04431c1c915f96b459 SHA-1: 7b901bbd6cdae2e414076e5050e9363bec0602d9 SHA-256: 67342757862e9615b5485beffba5528afe1434338ad5200af2d01996765d7695
164 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many of which point to compromised or disposable hosting domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • 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 http://faradbox.pl/files/file/6218707763.pdf In PDF document text
    • https://bandai-k.com/userfiles/file/65594740820.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/viwesejeduvuxeriperufo.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/11053375499.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/95269574688.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/pibepajeligon.pdfIn PDF document text
    • https://pbpkrosno.com/fckfile/13361286967.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/vexaxofefusuvetufiridibex.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/pujelelipofujokakezizop.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/87201053267.pdfIn PDF document text
    • http://www.polni.si/Images/files/lubom.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/tixorew.pdfIn PDF document text
    • https://cinemaparadiso.site/uploads/files/sadukebinafufolol.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/98159468551.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/rubojeramezusadaj.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee886f4085---6647908348.pdfIn PDF document text
    • https://digiconelectronics.com/media/19084361360.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/motogopitinesede.pdfIn PDF document text
    • https://clubharison.com/userfiles/file/65179308072.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161420bc328dff---todufilixaxepenile.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/22028392061.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/61445356959.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161597778c7fb1---dadofakuvavazutafagitozid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=what+do+the+f+keys+do+on+a+pcPDF 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_off0000b189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB189 10680 bytes
SHA-256: c76fe98c1a6a7877cb169e0863c5f1a5fd026a3164f619977b1bdc8002c03c7a
font_01_sfnt_off0000ca0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0D 15780 bytes
SHA-256: 7321850b32ce94c305da749018b1dbd146d602216b860fdaa205657065d4f8b7
font_02_sfnt_off0000f25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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