Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e96cc06f7e0b8c8…

MALICIOUS

PDF

81.7 KB Created: 2021-07-03 01:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba08ee166184cc6329c890bf7629cdcd SHA-1: e8d11500089c1e1c6679607e0cbe9a2b86e248b6 SHA-256: 6e96cc06f7e0b8c89f952d4a0f0ce164d6977221ad12d0182e989f5aba3c50a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, specifically targeting file upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a13af067e---jabuponapaf.pdf
    • http://itemclinicchina.com/ckupload/files/48388524645.pdf
    • http://xinyuemu.net/assets/202106/files/20210609001143697113.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc02c9b16f9---fotefilukiwazukeje.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/6kfn6jjvurje83vjmh490drs86/42610758133.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/v0al1a3dtkqjd7i41ibsg6b5d7/56447486578.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094181abe31a---53385954864.pdf
    • http://hykylalumni.org/userfiles/80385699820.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/bb7acb030e8a54ff7bf2c5d0c832b718/53920391417.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607521dec65e1---butikola.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba63710596---repof.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/7fbb66077366217a6331430cc6145507/6560778219.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/16acebdeb8ed87cabc5a1f5b0543de76/dawofujogoruravarutopo.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/cd721db0f7e67761f8054274e3efe520/tanofupugil.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083639025b16---80362125250.pdf
    • http://szyuangang.com/UserFiles/file///ropuraxafifinofenofavam.pdf
    • https://bouveau-consulting.com/userfiles/file/fazomab.pdf
    • http://machinegroup.ru/img/outer/files/39434268203.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/39hc83f4dnqotmbbnadtqkpdc4/vasejebavu.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/5c0f55273987f0d70afa13f3db662d3d/44969914986.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45def8d65d---bewipizuzobub.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974f1fdda03---jagenofig.pdf
    • https://apotekatia.ba/fajlovi/zugojanalatezu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=advanced+online+coloring+pages
    • 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_off0000dc1d.bin
9ad63229b7a28c41e3c2d834c1038221217b8621608ca60af82f4bd0245d6caf
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 17396 bytes
font_01_sfnt_off00010932.bin
657f9a57e09e7f1f5e5c4b1898a86b9af7049f8d070a42bc8f9a34b023511dfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10932 10640 bytes
font_02_sfnt_off00012174.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 16792 bytes