Malicious PDF — malware analysis report

Static analysis result for SHA-256 320be01f962b5610…

MALICIOUS

PDF

83.5 KB Created: 2021-09-16 17:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f93d7e32480f1dc1e15983695b4afc5 SHA-1: fca04abf8f89cb2033e896d960580703d0c152e8 SHA-256: 320be01f962b561064cbb40f2aca33876a092bf2d623856937175a35031d30aa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=on+the+hunt+john+wick+mp3+download PDF link annotation
    • http://concilianavarra.com/userfiles/files/nilazotowesiwag.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/kakel.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/41354545451.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/xazawinejozozikiruvepina.pdfIn PDF document text
    • http://rnralpha.cz/res/file/nevomujulitu.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/74436979494.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1d9d81dc0---16916998887.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/40107794664.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/15246668545.pdfIn PDF document text
    • https://happyjourney.webtrails.in/ckfinder/userfiles/files/jaziw.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/wawuvomakuzapegulijofora.pdfIn PDF document text
    • https://derfo.info/resimler/files/guzefuze.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/90340002866.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f27d59c06---47718067836.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/jilajot.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/pijixafuvajepofov.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/57392332431.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/6878063633.pdfIn PDF document text
    • http://medi-sen.com/files/files/35218914139.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613760b9a6bc7---58361516755.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/tosukux.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/1449589807.pdfIn PDF document text
    • https://rasathantrananotech.com/ckfinder/userfiles/files/sigowukirexojakupurudove.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/21945331520.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/40354236249.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_off0000d4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C2 11116 bytes
SHA-256: ff9c034a2e488826dd8599409dc958eb00e1f26483f398b39589bde42ff0af71
font_01_sfnt_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 21856 bytes
SHA-256: 436f8fe14b723315ab4857836aca314dcb665e52b5f5fb48dc16329d4333ddf9