Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f96b8be21035df…

MALICIOUS

PDF

77.5 KB Created: 2021-09-27 00:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bcd5eae51390d25d1c06a74572777b89 SHA-1: 0d69d6fbed46e31f461ee37adc0c6b3abfe8ccc4 SHA-256: 97f96b8be21035df5d6ae785433ba51cc0b3fc6d6a9e649642d8817f2318abd7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://thechitay.com/uploads/userfiles/file/wuwawete.pdf In PDF document text
    • http://bio-scan.com/userfiles/file/5919054170.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/gofilomekebifetat.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109181536481830.pdfIn PDF document text
    • http://eventechsite.com/files/files/83862577026.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/vatudoko.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/dibowoxolakikiwalubutupe.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/vumopamevinirim.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/cumtoqco9fh0u6fl3nk46je95m/9650203638.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/debotonorofisosoberemes.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/30ff96df0e936920590f44bbaeef91bd/83052559684.pdfIn PDF document text
    • http://xn--90aatbabxd8ae1kf.xn--p1ai/files/waniginewazuxudoli.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/mugofejaluxusev.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/10851442392.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/wedetasikogizap.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/goziniguwamotilorej.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/67300190567.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/kimileguludavirix.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/salizegipawavemewafeku.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/gaxejebukudasomakora.pdfIn PDF document text
    • http://chapelguild.com/images/usr/gasiw.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/palotebomibekag.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/gosagorifamesenejirapexad.pdfIn PDF document text
    • https://duel.pl/userfiles/file/bosuzawaxedefigofizan.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/rabekadazakuxike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=auto+insta+viewsPDF 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_off0000c86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86F 18776 bytes
SHA-256: f5176ba5f86d2728bf79309da203ec4654d20507522cf00c589cef353cf854a7
font_01_sfnt_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 10188 bytes
SHA-256: c13bb728f2bcd58a0201f43b37d9b684db130dfb26e1a89888b024391eb59e90
font_02_sfnt_off0001102d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1