Malicious PDF — malware analysis report

Static analysis result for SHA-256 a289432eeeba1d98…

MALICIOUS

PDF

67.9 KB Created: 2021-09-18 14:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 117223cf401d9aa6775490b9bf2f1744 SHA-1: 5bee5f119ab868195a045c5630f3c2480b6300de SHA-256: a289432eeeba1d98a2cb85d0996c862f594dfa6fcf8de8769cb733f5c0361f8e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5117

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
  • 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
  • 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://pistant.ru/uplcv?utm_term=left+to+survive+mod+unlimited+money PDF link annotation
    • https://profesa.net/userFilesfile/29274833321.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/xagijavexiwomiwoxu.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/67451254279.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/57834466568.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/bogatuwixuzaz.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/85981881790.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/31f0d1f68cc5920189c331ca7acd61cf/44322545419.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/29913208766.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/85114876459.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/kegeguxobezajipogiwibumax.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/23269599255.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/fetawusasanavalusimad.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/16018352684.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/nizuwifunegadofo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614091d92f433.pdfIn PDF document text
    • https://menu2uplus.com/images/file/64210469000.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/29944203466.pdfIn PDF document text
    • http://orthopediedelft.eu/files/43199360110.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/ridebumuv.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/dulemenoravosudobevor.pdfIn PDF document text
    • https://securitydm.com/slicice/file/jusivalaf.pdfIn PDF document text
    • https://robertbah.si/files/file/87886158712.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161313bd14a995---nefixevuzinijirelajovev.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/varamu.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614034e3ca069---kabulavejapopovogiwexexu.pdfIn 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_off0000bc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC50 10588 bytes
SHA-256: 0b229a1d7f5ecb93a23120f4afcfdd29c4602a4313e541d7007ec6181be4c996
font_01_sfnt_off0000d486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD486 15408 bytes
SHA-256: 51e8e9e29047d65d5f520a0f0d9527d4fba13f2bedf26d99a545756080ef8f2a
font_02_sfnt_off0000fb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1