Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fec181a18dfbae9…

MALICIOUS

PDF

83.8 KB Created: 2021-07-24 10:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 30bd12e3c626a5bb6906dd859b171356 SHA-1: c124215333b5f1cfefbb4973bceb56ed28d6b50a SHA-256: 9fec181a18dfbae980a3732c89ab89a2d67939eb449ab1d8ee9b6e324e211d0a
96 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. The ML classifier strongly indicates maliciousness, and the presence of numerous links on disposable or compromised hosting reinforces this assessment. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e826fc0431---kowibupixoli.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6b69794fa---fidavo.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/60nbjnjcs1cbrmim23f49r64cj/53665544653.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c198d5ec120---similukaravo.pdfIn PDF document text
    • http://altinay-law.com/images/file/dumuxivika.pdfIn PDF document text
    • https://telenovella-bg.com/files/teguxe.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/2487691135.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/8oo8avic67elilkc4s460dpd11/wavegozarola.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/ada3ce9d86be3106df7f77b95353a4cd/38206272876.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160859c916db84---komosarivuxe.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/mnb3rmttkoq59ke85v2ksaab8e/rinenurure.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/4f1794857d64dce57d9dc4a241d3e97b/bijunemonakewewozolajaji.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/89788617300.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a69d817e60---tupulubajekelixonewupiz.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/14727672511.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/pilujatubujuzifadame.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b75b0fc688a---tenadijover.pdfIn PDF document text
    • http://limoride.net/gallery/file/40216072582.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/fusip.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/t58dkt1h8mjshbj8eqqog8omn5/24783941443.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/kdn3luu0lf5avg13cfkll5us96/debasaroxexila.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/manaxajunumudog.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/96996756105.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/94feomf6cn80ckc5gugqdti7kh/87186667994.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=apk+editor+pro+free+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 10484 bytes
SHA-256: 16648f6e596da5bb48bddd7d03f3dce45f2c888186bc9f8e5de6716aa0b96e4f
font_01_sfnt_off0000fa10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11222 18024 bytes
SHA-256: 1f95100175d0eb28709c5ad4a970642b5b5d0a19f3c7506591a69724b6851dcd