Malicious PDF — malware analysis report

Static analysis result for SHA-256 933532242d748f10…

MALICIOUS

PDF

82.1 KB Created: 2021-09-09 02:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2ee40983f60e1484d10a0b3e36a5f1de SHA-1: 3df1a0f23764be6e27852fa793bb4b3b757e865e SHA-256: 933532242d748f10d8086848cd65e850507a6f09129a2525ff72a497c985fac3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it's designed to redirect users. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests a tactic of using many links on disposable hosting to obscure the ultimate destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=hairstyles+that+will+suit+my+face PDF link annotation
    • http://thucancakoihikari.com/luutru/files/nuzedigisuxodonuwokul.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/29545735525.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/86059706020.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/ralarobalufixozo.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/febutifedatabowewa.pdfIn PDF document text
    • http://honghuibio.com/d/files/77904424622.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d34db35e7---pirufok.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/vitiwibigolid.pdfIn PDF document text
    • https://kapefashion.com/files/files/72617831624.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/8779d7e93830207e40d76ccc717dc037/ziloveporeze.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/95272781152.pdfIn PDF document text
    • http://wych123.com/upload/files/ritutokubozivepo.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/67804703566.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/tanalukukawekaleladajogad.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/77716531559.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/74214699027.pdfIn PDF document text
    • http://kdekdyjak.cz/data/45075915742.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/tokuxolunofon.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/jatubomefoxedolar.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/sinos.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/40693692188.pdfIn PDF document text
    • https://efnnma.org/files/file/metakepimuzeponakawaxaj.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_off0000dcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAA 17604 bytes
SHA-256: 71843ffeba5be6211cf0e327b21b7a370a4838028ff64a8baa2901d8d40895b8
font_01_sfnt_off00010a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12273 10668 bytes
SHA-256: ed75dba469cdc2409836ee0c5ce477b2cdb06169ec0dbecc8a8f2acfa942f9eb

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