Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f5a0b73d7c7af4…

MALICIOUS

PDF

85.9 KB Created: 2021-06-30 21:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa0948f451f0b7189def7a10aa2bcb81 SHA-1: 96b6a4b21102e3ff44f613ba4677d45926a00a89 SHA-256: a0f5a0b73d7c7af42794fba47e4ae4045acd318b0178f103896792ec9374cb84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites. These links likely serve to redirect users to malicious content or phishing pages, a common tactic for distributing malware or stealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d60bcb49c2---vijomo.pdf
    • http://ekotop.eu/userfiles/file/korasodekez.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e886c24941---32000625888.pdf
    • http://asianmosaicnyc.com/userfiles/file/jotenixer.pdf
    • http://slsnn.ru/content/files/8229278530.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16095c9e05116f---lumulefopitoralazi.pdf
    • https://baobihungphu.com/media/ftp/file/75082405621.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/01c5292a786371b39a4736053196783c/deturavo.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb2a4e8c1b---62034580594.pdf
    • https://qualitymattressfactory.com/admin/userfiles/file/98193226309.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607478961ddd4---87428865783.pdf
    • https://akita-inu.lv/www/files/files/kuwuwesisegelav.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/9123dbdbb37447c964f4bd77840bf6b3/nidadowe.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/31288735829.pdf
    • https://perfecthospitals.org/FCKeditor/file/83921694684.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/de359d0e650a2dbbfc00d1d5eaebdeec/kanekijeniwozamuvuvexuje.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa20793514---83327734971.pdf
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/tifebulawedaxub.pdf
    • http://www.kilincsweb.hu/fileok/file/6570173581.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6debe47b4---64882118560.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090721fc4000---6713309387.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0469587d8f---50911824590.pdf
    • https://eobliecky.sk/userfiles/file/podezetixemuwamazebemewok.pdf
    • http://verkaufs-akademie.com/userfiles/file/29497542721.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=i+wish+that+i+could+be+like+the+cool+kids+song
    • 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_off0000e85d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 16792 bytes
font_01_sfnt_off0001006f.bin
4ea387fa0049bb01e575cf01becbd5f2177ba18d7bc79e99ec1ca45de508b2db
pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 18036 bytes
font_02_sfnt_off00012f50.bin
623fce9ad0f8724f0525535fc292ebc634bfc7db7844bc7f29aa85b64471be84
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F50 10916 bytes