Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de70f0c6ee145a9…

MALICIOUS

PDF

69.3 KB Created: 2021-09-28 01:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: abc76c1e290b23bcda5e91b31235a561 SHA-1: bc84dca80b6b86f24793dadaca236c5bd1b42af5 SHA-256: 1de70f0c6ee145a9f92ed7a3641ba468ec015372a332fb08d34127f65b164885
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded JavaScript and numerous external links, many pointing to potentially compromised or disposable hosting, indicates a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.parinet.fi/tiedostot/files/45912130964.pdf In PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8d5088a8930bd54b6893edc45c88b31f/89192555524.pdfIn PDF document text
    • https://bunianco.com/other_files/File/26302449858.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/putujibi.pdfIn PDF document text
    • http://kodemari.info/data/files/benebiju.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/65703312937.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138eb0047678---ropasepadafusefexakozi.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/rowojofepakaxona.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/53255920344.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/tjuqn615f9bt4hpq2tp8esnlau/vukilivalud.pdfIn PDF document text
    • https://ptogel1.com/contents/files/zuzodenobegodipogav.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/donatevixog.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/podasi.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/juvopalo.pdfIn PDF document text
    • http://luyutea.net/v15/Upload/file/202192313298227.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/lomobane.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/popix.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/93796448436.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/rizijebog.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210903061320.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16143ddda54d43---pixogizu.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/molanafolejefiwebemeliw.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/terepefovefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+export+from+indesign+to+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_off0000aef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF1 15832 bytes
SHA-256: 7dd784ae63fcc49cae2d85dceb2700424c6a43d6560937a1d044a388497c27dc
font_01_sfnt_off0000d733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD733 10812 bytes
SHA-256: 8666bd4c84aac399f790fb42332c223e5cdbbebb1396db8a6fe3b8592cf12fd3
font_02_sfnt_off0000efef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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