Malicious PDF — malware analysis report

Static analysis result for SHA-256 e931a5baab7b42ab…

MALICIOUS

PDF

85.5 KB Created: 2021-08-03 18:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cda03cf24074ec898129916d481b6515 SHA-1: 063698e8de2f1641dc7b1acd81ae5db6dea778ea SHA-256: e931a5baab7b42abe3b41d9ca57d9753d6ba427b4a0e05ce044f0003a957c502
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://infrive.ru/uplcv?utm_term=how+to+hack+wifi+without+root+in+hindi PDF link annotation
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4b66936a099338105312f0e8a5c0acce/77795325067.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/172dacb04aa142e9c2b95587b79b0e6c/43949668227.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b208d6670e0---feniginigejepuropatesumom.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/70189700704.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/jorifatej.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/29821014063.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b2d4ea474---mufasuw.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/8b7186b72fda309dc8640c4e53ae3777/2905933095.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/64181342597.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/11810404649.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/wadojuzupulogabotegorodo.pdfIn PDF document text
    • http://rafaelokazakov.com/file/42082927682.pdfIn PDF document text
    • http://madinaboys.com/easydo%20v2.00/files/uploads/luporefi.pdfIn PDF document text
    • http://runbo.net/upfiles/files/1627700815638.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098d774cde14---fadoxebokifejukokurije.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/koxomasapelos.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aeed1d866c0---89957518628.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/91670199540.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/60sl6j7gsimv0gknl2a9plpsu9/jonol.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/dijuperiwikabe.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/fawijadezapal.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c44c158f0f1---96505683545.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/46886602374.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708e2549a1b---38572754004.pdfIn PDF document text
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/vobowosobavikusazoj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 10496 bytes
SHA-256: aefd22c54d6f7f24c3c73710fb748b3530a577802371c370458a480727c97991
font_01_sfnt_off0000f91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91D 17388 bytes
SHA-256: 528a8c7bd2ec7174d0701c74e8660cc74fa0f5e991b78976330445c08aeca3a5
font_02_sfnt_off000126ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126ED 1672 bytes
SHA-256: 3f1748778f03e7b7e2d3a6c88ca15ef060a02f224cd71155e662fde9dd4c56c7
font_03_sfnt_off00012edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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