Malicious PDF — malware analysis report

Static analysis result for SHA-256 35542a499ade0936…

MALICIOUS

PDF

71.0 KB Created: 2021-10-03 22:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 82dbbea6924942a5fca1ac60797613cc SHA-1: 1277786e5f576e29293c717db3379b8540803382 SHA-256: 35542a499ade093630526198a3f14f34d6c68559f37170726a7bd6892a1207ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a URL that appears to be part of a link farm, as indicated by the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM'. This suggests the document's primary purpose is to redirect users to a collection of other potentially malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://infrive.ru/uplcv?utm_term=despicable+me+3+download+free PDF link annotation
    • http://szamosiszerviz.hu/feltoltott/files/21570433726.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/keridipaj.pdfIn PDF document text
    • http://katachizu.com/img/news/files/908481206.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/muraguvefafepokip.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/270253476044.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210911130331.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/nuvil.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/notoxugunoxusezuteturavo.pdfIn PDF document text
    • https://svltv.in/userfiles/files/47308900260.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210921141725163.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/59274784185.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/53495595394.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/vajodanutexurarevujotof.pdfIn PDF document text
    • http://kleni.cz/userfiles/file/65346860185.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/53447266275.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/99777249205.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/detilagiti.pdfIn PDF document text
    • https://www.poeles-granules-vasconha.fr/ckfinder/userfiles/files/50861021620.pdfIn PDF document text
    • https://asp2.aiwangyun.com/ckfinder/userfiles/files/92096204232.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/38706477767.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/fivimumexemelo.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109230821197054.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/12b8e0a336424157bc4de33c1e9ef8a5/ziwibivukozu.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/nixerotal.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/renesipevobewulenuxuva.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/retaferudokewaxadofabaw.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_off0000b297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB297 16644 bytes
SHA-256: c1ebded60aba7311146e02b47f6f53126deaf83ccae74678315645b0f7445a06
font_01_sfnt_off0000dcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 11080 bytes
SHA-256: 419bba2b7e95effa9afa16d3e68188e35ce41159f2d3fedb4320897f386f6ad6

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