Malicious PDF — malware analysis report

Static analysis result for SHA-256 17050d565d5403a6…

MALICIOUS

PDF

69.3 KB Created: 2021-10-03 10:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9c6b672924d226dc824698c432c9d095 SHA-1: 9eb0d4334a746e3e7fbbf4ca60cf9c781cc06488 SHA-256: 17050d565d5403a66355fe89e114847a5d7902475df5449e058cca3f603e7ed3
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate that the document is designed as a link farm, directing users to various potentially compromised or disposable domains. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic of encrypting payloads and providing instructions to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://goldenbaycruisesagent.com/userfiles/file/kupodunefujon.pdf In PDF document text
    • http://anninh247.info/upload/files/wevebixawiwatesu.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/zafurajowekezi.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615629ab4d500---vokonefara.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/74301171296.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/tofijefawixijerirem.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/gadixaj.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/41101130424.pdfIn PDF document text
    • http://packturf.fr/files/85399978888.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/1c902485fc83f648cff1b2f562500728/tobofedazaxap.pdfIn PDF document text
    • http://grabnerestriche.at/luwifo.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/16738333123.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/8870870012.pdfIn PDF document text
    • http://bookblog.kr/data/file/files/zowiwasej.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/pifufig.pdfIn PDF document text
    • http://boki.hu/editor_up/lubezojidev.pdfIn PDF document text
    • http://zamgph.com/uploads/file/022020455519.pdfIn PDF document text
    • https://phnews.ro/files/file/vifigifafunajitexapedez.pdfIn PDF document text
    • http://gongin.humenia.com/upload/userfiles/2021/09/files/210916150159.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/29642887920.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16141baafe4901---25651663743.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/12803333360.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/56492742826.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/81309018367.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20211003140740_s481cw.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/30/file/20210930_185138_190.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=what+do+bass+feed+onPDF 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_off0000b3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC2 14736 bytes
SHA-256: 568015372ec1a147bcfe7346b8c9a1f6828478754f6381488af655eefcb331f6
font_02_sfnt_off0000f02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 10344 bytes
SHA-256: 52e3d6643da27d4b191d54e3c10701a2682d2c28023ba334496c3e735eab8c34

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