Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06c2cea8787bf52…

MALICIOUS

PDF

92.0 KB Created: 2021-07-10 12:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3f8ffe36b8fa66c70d2e3a5607f1785a SHA-1: 9e6490ba8f99a7416284430f2149ebccc3be83db SHA-256: b06c2cea8787bf52bd5ba7ca31f6cb5e79d9d8c94e84f846b7f779334c335295
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites and other disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL targets are indicative of a malicious document designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://perlawarmii.pl/userfiles/file/pelediz.pdf In PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/86951057162.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-6-14/20210614185630765864.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/3df3a595fe3611f0db58e3db1c4816bb/viginibokilubasovile.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/73524772893.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/2156666fc09ec363534fa97a21f09a1e/jotadewukovefivuz.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4e7cb11a5---34987472710.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db6848cb1b6---xujimubamip.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/fodomupolitazide.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/99847030171.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/nelaribarujugus.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071bb0e3af9f---3605398217.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/78093566027.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/62819089583.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/be46t5bdf5cqqt9lpvk4gp8s03/tulejijumumimozox.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/sopetaxamawomemepixefajo.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/j6u1ft3ugstntiphafeirhvav6/vizapozivosi.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088df9904b9c---rifejaxevivi.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/97475201764.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/33121965264.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e954dc50f---dozas.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7faed232e723b7447eb15b7af01c993a/73850099417.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/tenilozexufumepefofo.pdfIn PDF document text
    • http://ubest.ru/images/file/19782800925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=counter+strike+ps1PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD357 25788 bytes
SHA-256: fc9ccac027ac097c6f7e6a9fd462fabda9aa1d68ebeeb80ee038069029a7bbc1
font_01_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12646 10312 bytes
SHA-256: 8cd7748b6e5beea631c460d94f3277f874b9fdbf597017a5eb03a342725fddad
font_03_sfnt_off00013dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBC 16340 bytes
SHA-256: f0689f0114f110f026f5e5a07a1188029bd04c8998886562028aef0e177d8269
font_04_sfnt_off00015407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15407 2936 bytes
SHA-256: 4e5239af9d631d8a51333c2ea3d1578c70c4cdacd6be50e05dd706e1ff3c274d

Open this report in the interactive analyzer, or submit your own file for analysis.