Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e68fb907506786f…

MALICIOUS

PDF

74.9 KB Created: 2021-09-10 08:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4c4de107724a060e1d87b0c79395550f SHA-1: 882a0e483d3026ea0536e221f83bf4c3db0dd958 SHA-256: 0e68fb907506786fcb81d91ee2edbf0bc23cb1dc586287fc96372c553bb911c5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many pointing to unknown or potentially malicious domains, consistent with a link farm used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://messianic.live/wp-content/plugins/super-forms/uploads/php/files/74bf9c5d4ed5342d80c14b5c34a7c4f2/92007948769.pdf In PDF document text
    • http://salukool.ee/upload/userfiles/file/96525328516.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/jaxaw.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/kepezobetaxoligipus.pdfIn PDF document text
    • http://enewind.com/pliki/file/diverunenolarifi.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/lubovifovog.pdfIn PDF document text
    • http://kangmeideyiliao.com/uploadfile/file///2021090309384945.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/zurewojupediwotozetakale.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/54288918689.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/17156635370.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/53244168487.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/32608744119.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/sudidepuzob.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/zijugefubetu.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/23133662903.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/94605793887.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/76250813204.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/fakoboritevoxawuda.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/zexivuronozufigexozafu.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/deligaruzodibodamikibilur.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613548b733949---67786726025.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/rexatagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+make+a+camera+app+in+android+studioPDF 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_off0000bee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE5 17668 bytes
SHA-256: 756f3a2f82685ca9e6859e67260c532a2c56d63c9eacb517a7155f12e4bb51c7
font_01_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B3 10900 bytes
SHA-256: a770a1d90b160c70d8b1b01f780e2c13f5697f30c9197adfc6197522f844e55d

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