Malicious PDF — malware analysis report

Static analysis result for SHA-256 e801ffded348612c…

MALICIOUS

PDF

86.2 KB Created: 2021-08-14 20:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 35102a7b0e0e6f6e385cc0b7df49411e SHA-1: e4e2824d6215c8bc01a91d5b9b871ca6e078f376 SHA-256: e801ffded348612c2f3772021522a0ac1ea7d6dc447bcb167c335535dc838254
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The PDF structure and embedded URLs indicate it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/8f9e95856d3a3d63e854cffbc8ff2f50/vibejatus.pdf
    • http://garderoba.sk/images/_file/basonufijopedosavani.pdf
    • http://auksozvynas.lt/userfiles/file/46044399365.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/22a3879a3c82d385310ea5a108c14bd4/zibijifakumatazumarego.pdf
    • http://beiks.info/public/file/27914308454.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/790271f6877173539b241ea16c5d472c/pajilosilarifegesidewale.pdf
    • https://ienter.bg/files/nafukegiz.pdf
    • http://henanshuangxin.com/d/files/luriruzibumuk.pdf
    • https://locktactyuma.com/ckfinder/userfiles/files/86184915538.pdf
    • https://alihuata.com/userfiles/file/93666117084.pdf
    • http://centralgiving.com/media/userfiles/file/lonal.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16097ba53db226---90138626239.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/dnh2q02n7q7ninte6odadc7if6/kovenisewoxexufufowesu.pdf
    • http://hanleyresources.com/images/kojevevevarudeb.pdf
    • http://bociany.sk/media/file/wikisodixoxesamiro.pdf
    • http://greatwalledmond.com/ckfinder/userfiles/files/giwodejufunipururibuwid.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099271755aed---70752735283.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4745406e64---kefezisirunides.pdf
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/2283643683.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a82802a27---nuwijiwol.pdf
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/1938284041.pdf
    • http://bmcnx.com/userfiles/file/41169698354.pdf
    • https://pearproperties.in/userfiles/file/xolevisomoj.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+tell+if+probability+is+independent+or+dependent
    • 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_off0000ec05.bin
170cfd6de05f7dc6e9f0d37be3b71fad37fc0fe0818fdc7d8d907ecda7df44b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC05 10824 bytes
font_01_sfnt_off000104e5.bin
b60058dc397108258af584f3cb4bda4857a4db6974da8e6841f82df5e8f9312e
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E5 17484 bytes
font_02_sfnt_off00013288.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13288 16792 bytes