Malicious PDF — malware analysis report

Static analysis result for SHA-256 f718634c67561800…

MALICIOUS

PDF

84.3 KB Created: 2021-09-10 15:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b07763993b7a1ba280ebe3e22bf3e7f1 SHA-1: 65b17ee7cb541da23a3bd7fe726f58a763f8d122 SHA-256: f718634c67561800a36c2f4c442ebcbb17cea73630de928a1bb92ff057818139
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous unknown URLs indicate a link farm designed to obscure the ultimate destination, likely a phishing site or malware distribution point. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://awfiowv.love-mrt.com/upload/files/ziferepuju.pdf In PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/dacf4bf3915d1d0ae8c79dbd02f002ea/16295614566.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/wozelevifazigepire.pdfIn PDF document text
    • http://hidramaco.com/files/files/rizuvananamil.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394c80800a2---vudozevedupu.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/kefofera.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/37675332482.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/vupibajupuruzegodariw.pdfIn PDF document text
    • https://derya.afmiletisimajansi.info/resimler/files/25117624510.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/kejofazawegitadimuza.pdfIn PDF document text
    • https://birudongker.com/contents/files/96507924124.pdfIn PDF document text
    • http://iacsglobal.iacsinfo.org/content/uploads/files/72343570987.pdfIn PDF document text
    • http://grafitym.kz/files/file/95646284989.pdfIn PDF document text
    • http://erex.hu/upload/file/5775884903.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/dilefebowejofodulufan.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/72624642914.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021090706435573499.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/21101490974.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/nezaxa.pdfIn PDF document text
    • https://superpart.com/files/bogevuse.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/xufimozizesozupokevivuka.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/falatujilev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=note+20+video+callingPDF 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_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 17784 bytes
SHA-256: 064a2c4e552518b85d33ae59689e58902826cb361e96798b72f76146ee69cef2
font_02_sfnt_off00012b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B78 10564 bytes
SHA-256: ad08ff83882cfc7fd7688bab451f015e04248385e5ef68a0d2a5a8f7dd86d1e6

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