Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe0e5e0b35da10f…

MALICIOUS

PDF

88.2 KB Created: 2021-09-22 17:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 41c5d185ceda398aa5c304bbcc64152d SHA-1: 662316542f276c8adc94354da58ccdef03ef45ab SHA-256: 6fe0e5e0b35da10f00a77092484bf31a718a13b8dee3982d32ca45d219c01d49
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous external URIs pointing to disposable hosting and potentially malicious content, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF structure indicate an attempt to redirect the user to external sites, likely to download further payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://synerhu.ru/uplcv?utm_term=bob+movies+apk+for+firestick PDF link annotation
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16131820684c7b---firimolopivufupupijo.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/selurerinabivonitiva.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/38416445756.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16131a95bc9fa9---genev.pdfPDF link annotation
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/77925889641.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/monoluwesu.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/tadolo.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/mezusinezab.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/weviz.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdd6eb6238---66809608680.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/ladinubezogofejuliropedis.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/72314643739.pdfIn PDF document text
    • http://nadafashionbelt.com/Uploads/file/xedagoworutisabonezibajiv.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/tugipumeridefe.pdfIn PDF document text
    • http://yoron.net/up/files/57265039701.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021090811353078.pdfIn PDF document text
    • http://vipacademy.org/userfiles/file/felalisopib.pdfIn PDF document text
    • http://xn--2-7sbddqrtdw3be6jua.xn--p1ai/userfiles/file/demujilobomin.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/fofirutawezijow.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/63483849947.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/gagorubizozojesif.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/dokikenezikomafapuseda.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/wulumapifamepoxawevuke.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/3355002264.pdfIn PDF document text
    • 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_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 10840 bytes
SHA-256: fb7a9b31f7e0b81de4caa5e26758072e55b92c14e1f931cc662cfe49cca7d568
font_01_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 18880 bytes
SHA-256: 8dc9929fade292f550f7942e39b68ef1716c053fbdd56d7cc02c7478881d055d
font_02_sfnt_off00013b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1