Malicious PDF — malware analysis report

Static analysis result for SHA-256 575b8e044861ccfd…

MALICIOUS

PDF

84.5 KB Created: 2021-07-22 05:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e670231508412b3b83b8542f0ad5b2a9 SHA-1: 3d3ce506c6798d5af2c2cf261c6c9d0b425a927c SHA-256: 575b8e044861ccfdc258995394d8fc2a0621d45cb14978c401733a04181e4781
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file exhibits multiple indicators of malicious intent, including hosting links on compromised CMS uploads and a deceptive download button lure. The ML classifier and ClamAV detection strongly suggest it is a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a workflow designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/01k4qoq5gldoi7gka5kpafffg5/nobikezofewerumitili.pdf In PDF document text
    • https://koncnc.com/genelresimler/file/weburomolotivojojexorej.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/vifosi.pdfIn PDF document text
    • http://ranagro.com/files/niruxaviv.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc91958c58---35250533443.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/9d5a0b5e08b598a2fff29ac7e1c27158/95212008584.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56754d88d7---nanamezaxipadil.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ddd9c4c9d---23247768203.pdfIn PDF document text
    • http://stylekd.ru/files/kituwat.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160847d913fe31---4789201153.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/49a582fb4572e1034a97c5c985da0c47/mizadimufakajuseluki.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/tetirebutegonitibenusunug.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/16/file/20210516_154308_148.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad019d7f48c---99126277078.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/kuvagorulikosixaweluwaje.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/90737217167.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16074fc15f3944---jiratofixidakigol.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acdc4d0a54b---getaguzikarenenopasaxewe.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/pegofigesarenokoropa.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/felutebutuxipewem.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/78228662981.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/garunedobemakezaditidawej.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/31564735999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=download+fts+2020+mod+fifaPDF 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_off0000e5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CC 16728 bytes
SHA-256: 2deecaacec39554be8793181a194b07d0170df71934ed61ec402982fb3fed5aa
font_01_sfnt_off00011186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11186 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001299d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299D 10612 bytes
SHA-256: 428a3e22b0ed69c714ce71dfe447618d9e8e10f6a161f1b8554b0e10c701115f

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