Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb5e4facc66cb89…

MALICIOUS

PDF

86.0 KB Created: 2021-07-23 21:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57ee2a8219c33d5a7f9ca9361cb1ff40 SHA-1: a674f2618ed9931abec0f55b2531bdde9776c21d SHA-256: 0eb5e4facc66cb89028e395ab44c407b56b75c800322081acbecf51377099430
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links pointing to disposable hosting and compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no further context on its specific purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://peterpan1996.it/userfiles/files/nuxuzikedegar.pdf
    • http://gat-asset.com/CKEdit/upload/files/zolimurivematenezomo.pdf
    • https://marblobaths.com/app/webroot/img/files/88382286847.pdf
    • http://doubles301.jp/files/ckeditor/files/belixevobubipop.pdf
    • http://arohitourandtravels.com/userfiles/file/fefufutimilaponigogudu.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/ao6eln9ltsouhsiu72r5t8ar8a/dipipiwaxitewaxajoxobina.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160984b253dfaa---36102135071.pdf
    • https://nikosdimos.gr/userfiles/file/28420181546.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2cff71fd272609a24a6b9457985b4dc1/mesuvun.pdf
    • https://rubenoferro.com/userfiles/file/tuwixokuz.pdf
    • https://pearproperties.in/userfiles/file/movowalexigizega.pdf
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/67223430752.pdf
    • http://reanda.com/jingkelun/userfiles/files/20210721142627.pdf
    • http://otevrel.eu/ckfinder/userfiles/files/fulaxiveguv.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c524efdb8e0---roxolofuxodinetafiromirur.pdf
    • http://kasargod.net/uploads/file/modiwigo.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/372794120.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3fe8jtq3nodfhjn21r9gajrema/64513189515.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/dowitifom.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/ctdi0234np90fcsosdrb9cu85s/62864655976.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1afb3e005---bitujizoxuwit.pdf
    • http://tipsclubcr.com/campannas/file/genamujavezizix.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4e1f004bd---nawewibagetuker.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/21eef369f6cb010b4d0076046aa2bb92/vodak.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=what+principle+is+column+chromatography+based+on
    • 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_off0000e5a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 16792 bytes
font_01_sfnt_off0000fdb3.bin
135f76e45cc414347b1935ecc3c3546a717d3647b5e9322a8f362d07a3566f10
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB3 18740 bytes
font_02_sfnt_off00012f13.bin
6d37b4f264fa291b80048997389cd33f18cddced34d1f44b6f8fa8ef75ed449b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F13 11308 bytes