Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e180a4a488d82cb…

MALICIOUS

PDF

77.2 KB Created: 2021-09-14 12:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0a250834c26c0d5ce8da3427f387c2d9 SHA-1: e49e148ae19f033fdfb9f8d140622d99752a2cb6 SHA-256: 3e180a4a488d82cb42edde772b72bac8a2db5a21e5067bd434746a36660c9659
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The PDF also exhibits characteristics of a link farm, with numerous external URIs pointing to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://internet-trade.eu/UserFiles/file/4636176467.pdf In PDF document text
    • https://viceda.com/userfiles/file/wewumadojuw.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/74351444256.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/disezonogirebaj.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/xinalesaj.pdfIn PDF document text
    • http://vakaruinzinerija.lt/userfiles/file/lozozodanepa.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f26081c47f---wolifalopetemexul.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/34870234424.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/42379881233.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25734552051.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/57058081447.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/25741379919.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/19218990715.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/13088487837.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/wumufada.pdfIn PDF document text
    • http://szybkieprawko.pl/szybkieprawko.pl/user/admin/fck/file/xojiwixoluj.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/19324785418.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/lubijesarafevurejenukev.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f133e35ef4---9846087361.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/wuvubafagobekokenojifuge.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/besuturilegegerakudafusup.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/tujajixavin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=can+imessage+send+text+to+androidPDF 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_off0000c85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85A 18020 bytes
SHA-256: 65365f1dd2a8910931961582b1e8eddc943a20d9ca959e5f521487cd5d0cbb05
font_01_sfnt_off0000f70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 10676 bytes
SHA-256: 91e859118663e31fb4da518dc4fb71eccab8adf7a64dd632cef55f6ac4bcf945
font_02_sfnt_off00010f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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