Malicious PDF — malware analysis report

Static analysis result for SHA-256 62989c83f051c857…

MALICIOUS

PDF

73.0 KB Created: 2021-09-17 04:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6aa9c82833f5f39bb66c8ce15cbbc334 SHA-1: cc706f8a044ebfe9590096ddc31f28c9ce8eb94b SHA-256: 62989c83f051c857d38050cd769a6658ddc85d0a10a62a961438330b4ed17253
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to disposable domains, combined with the 'SE_INVOICE_LURE' heuristic, suggests a phishing attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://bettaletroom.com/file_media/file_image/file/19250650830.pdf In PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/7825919431.pdfIn PDF document text
    • https://tekartltd.com/upload/files/ledaluwojop.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/figuxuwiratulivaxekawewok.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/jikakidozolovofolomuda.pdfIn PDF document text
    • http://pronobile.de/catalog/file/90092055179.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/mufitezutilogupasikil.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/69535993806.pdfIn PDF document text
    • http://szjg.hu/images/file/58651320703.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/luvurobiparedezarozimon.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/xuzetibuwumulip.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/66272863962.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/gesufisikesotizelub.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/6153295028.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/2540171130.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/49765524765.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff07a78810---kofajafibopalaxutinasa.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/batezoxazimotomiruzukawid.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/tiraguzivuze.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161383a37da3f6---baforalabokiwulitojusogi.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/75834407651.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109130554526138.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/59984561645.pdfIn PDF document text
    • https://moolans.com/uploads/files/foxanazomodu.pdfIn PDF document text
    • http://melvin.cz/data/mezifoz.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/66331160501.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=france+ligue+1+teamsPDF 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_off0000bac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 10584 bytes
SHA-256: 01efeb669e5bc73e23afca25400f594fa281828e2e44e690b16852ec9519c246
font_02_sfnt_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 16828 bytes
SHA-256: 3f28ed0ec393c93fb31313b9dbf00fff678a37e86a6d1190d5b96ba792a6739a