Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb137a5454983ef…

MALICIOUS

PDF

155.9 KB Created: 2021-04-28 13:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1196701ce44a64f3e5509501de3ab078 SHA-1: 8ca6e10912434a14d6a35ce208377806238aa90c SHA-256: dbb137a5454983ef09ec32a46fa577f8dd3b0e16f65cc6f62768735683553fbf
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised CMS upload storage, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or SEO-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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.
  • 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://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/2c101bc077d580b255f47ad2b20d2cf9/kopijifujunize.pdf In PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/96b5d08c5c175bf66481cc84d7c79945/84974270752.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/kcktuag74q1c09cem1q4aqsmj7/gixuzivuwop.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/14e800db7dcae01ab650421e0e4b886a/dawitigaf.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/4c9305b1e36ed1ebb19dde9d73776d5d/putugitebapawivutigen.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160891541af409---bulidodakan.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160770a040ab4b---xalesomeburomenole.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079029fd695f---diwogojuziwasatuguna.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb022d7694---bawino.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab4132f49---28574525593.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071522908bde---sanugepugidaliwipe.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/4fc25fa2eab341a139d2ef0fce05d329/76365919481.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b13d575dd8---muligujilax.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160831bd39dfc8---41462191131.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=ahmedabad+city+gujarati+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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6C6 5668 bytes
SHA-256: 95476e9840a3531ce38edbbf65c06bf9a78f14dc645645e13b82b080018038b4
font_01_sfnt_off000209f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x209F0 6208 bytes
SHA-256: 7da298386b4f45ce34d4a11005f77665a96aca8fff6b1a365e3cb550517360bb
font_02_sfnt_off00021dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21DCE 14276 bytes
SHA-256: a342a587b163e923d67ea257dc8a0392b4f241f4662592c661df16a633aefba4
font_03_sfnt_off00024c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24C22 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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