Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc8d4880f1d026b…

MALICIOUS

PDF

75.5 KB Created: 2021-09-10 17:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6d14f4061756e968b75178b718efe412 SHA-1: a821a80e875696aa8113cecc63a5a958622a27b6 SHA-256: bcc8d4880f1d026be807e3f8150d23a685c8dae431fb73e1178a22b6c8288107
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URLs, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://nomylo.ru/uplcv?utm_term=download+mod+apk+dr+driving PDF link annotation
    • http://mingzhicc.com/userfiles/files/jatedunetik.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/dijezonozelupajiga.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320ebc70739---denewame.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/wopoporevutagelo.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/sakumamojiwakidatenir.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/87203558594.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/ridegasunas.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/ketodisaxa.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/sesurojamumemawemoputiwod.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/10431818832.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/11190516434.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/66344405419.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/26494723937.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/texomajotuwababijebodilu.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/93062380174.pdfIn PDF document text
    • http://ave-france.com/pics/files/58033537772.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/gupoxusidagub.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/33111921001.pdfIn PDF document text
    • https://cityface.cz/res/file/17456921531.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/siwisizakekojidetiw.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613882df98b9f---90927460182.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/8534555229.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109052248141535.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_off0000bf50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF50 19224 bytes
SHA-256: 6b0eedca629c7d266c09a7a708cd034b7abebd00d6c6006712effcf2fb89a394
font_01_sfnt_off0000f03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10855 10584 bytes
SHA-256: 4372ef2abc706d3e8f2332c46eb27d35ffdc4fdb01bd70e2b12a18926a62e3cf

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