Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49dca20c5eeecac…

MALICIOUS

PDF

85.5 KB Created: 2021-09-13 03:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ad342870a2e2c8cce1ccb9cd77ab74ce SHA-1: 881e2334766d0031642e0fe2fa9ffddf587664f0 SHA-256: d49dca20c5eeecac71c5c01acfdb857d4804ace7cc31b64b3e0e232ba80278a0
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating a potential for malicious execution. The document also features a high number of external URIs pointing to a link farm, with one specific URL identified as a potential redirector. This suggests the file is designed to lead users through a series of links, likely to a malicious site or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 5

  • 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://ehlibeytalimleri.com/resimler/files/sidixixugizakisederolop.pdf In PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d34b974994e414e57cbf6aa2ef11d4c0/peborasibidizuzajenexe.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/24878775179.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021921232493397.pdfIn PDF document text
    • https://sim2007.com/files/57223098509.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/58962266828.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/4362001456.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/21506301007.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/zufipilotugesakarunivox.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jufakid.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/tivog.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/jawapome.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/tamoresolanekawo.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109090500281154.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/48569088539.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210912222429595907h84guc31uhsz.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/wulajubufoxetufirojimokap.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210904_CDB90C63ABEA969C.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/94689860750.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/54916541103.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/sapukawamuzijeremoka.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/lujemug.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/51412968955.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/38844348709.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354fd7a4c3f---kubokona.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/famapemobakelaxe.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/27765815763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=m+apk+downloadPDF 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_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 18620 bytes
SHA-256: e95023df65172cbd7a121f276b665a49ab8830d6b8bd47f20164b73f0f6002f5
font_01_sfnt_off00011a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A39 9964 bytes
SHA-256: a02e8883a2656d92f6a406bb216a2a44a7ad8a4e2944ffe0b47a72af7beebd51
font_02_sfnt_off00013061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13061 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1