Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4305260ae66184…

MALICIOUS

PDF

88.4 KB Created: 2021-07-06 22:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee242f7388765637b5cd1f0f93845079 SHA-1: d6f656f9d4c6ae1ff6cba59fe0a6461be8e40491 SHA-256: ee4305260ae66184b0409124b277ad4617cbf228f30e4a3f18c535f0c3b3b1fb
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. This suggests the document is designed to lure users to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://akcjonariusz.com/UserFiles/file/58358789463.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ded377625---67517400389.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/5a99017b7c2cd869b115dc3654d0dfae/57532642281.pdf
    • http://hurtglass.pl/upload/file/zuturolaxivakizune.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16086503bd5018---45380785436.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8da1e896a---39885382259.pdf
    • http://broadmoor77.com/clients/39738/File/sujenegowirorixesudesu.pdf
    • http://geoplan.su/userfiles/file/13629989811.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078b352c5b78---32579452170.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/3fdf28071a0dc031edb6fe769b416fb0/simegakusameto.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd11dd3c1b1---sunodudaxetapomiwegetige.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/c5c5d0a0bc1b93aa36d433b19bcebba4/kekegefiwavipodawaxoma.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a43d9308996---nabetusirefirunaloni.pdf
    • http://radissonhoteltraining.com/userfiles/file/pudujinodutimafigumubinum.pdf
    • http://dakmoto.cz/obrazky/file/85397889067.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160b96c6957a16---bodudilixikisavivubarufi.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160afd38968067---59952616159.pdf
    • http://goodwill.pl/userfiles/file/35992394121.pdf
    • http://yearbookplus.com/uploads/ckfinder/files/60590768227.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14c81ea7e8---dinusalijusaxo.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/ba1a0ac05e5410b26a5d59c6e3e756fd/zakefesud.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/d9226503d864f99e126415bbde69f85f/82747801126.pdf
    • http://placc.info/up_image/77547676751.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=levator+stretching+exercises
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f426.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 16792 bytes
font_01_sfnt_off00010c3d.bin
aafb1553779cd154664196912b92b6998b648df649bb9c18162c81727435ced4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3D 10588 bytes
font_02_sfnt_off0001246f.bin
ebc2fc0e831483d3df8f2e3b1cd4d3179d61b61bbc60140397c4c125a3c8c9a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1246F 18276 bytes