Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae2f6dc03fadce4…

MALICIOUS

PDF

69.7 KB Created: 2021-09-02 12:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 657f03ff5f5b5f9201c0ecddca6fe805 SHA-1: a2cfce5da0b7e8d3d72a1049b732402764026267 SHA-256: 2ae2f6dc03fadce465c6b37cb991f34238655309be8f134a2decf2486ce218b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://itcck.org/upload/editor/file/94374654089.pdf In PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/27579840079.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/68000380707.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0ceee5e31---79545493848.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/toneneturinawazozepolu.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/43208105866.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/4aten05vm1gh1dfdm2vvf37al6/2585960094.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/gusipopamitekefumus.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/iijpl7gt6j0n6tfr2chiqm6the/64993342706.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16118d67ad35bf---63310857511.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/g7pakps95hbugq93ep86341ks9/78292933971.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607974adb2bcf---22125720910.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///54842832036.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/41f962a4a01d360400f9cda812e7f7a8.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0087285606---54212440965.pdfIn PDF document text
    • http://generoussecurity.com/uploads/rokorega.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/8006d28d287abb3d72547cc1d359f107/23707573624.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/bijawuwiperukituzirobaliz.pdfIn PDF document text
    • https://mauspro.net/upload/files/54329139547.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16117328d7a945---guzojumaxogu.pdfIn PDF document text
    • http://haai.org/upload/file/92138248297.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/4h19bduhjkgdk5pbpsteoe5762/nafuvuno.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/kulik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=diabetes+food+list+in+tamil+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_off0000b184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB184 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99B 10700 bytes
SHA-256: 6996534f0c467972a4c6a342f42f6cea2da271b47521cde3abc6d2abc0987dcb
font_02_sfnt_off0000e1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4 16264 bytes
SHA-256: 42b866cd05ad4325740acc4426381d7209ed5f88e2f51b80e547cd350e6194ce

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