Malicious PDF — malware analysis report

Static analysis result for SHA-256 a545b035b40cbc5c…

MALICIOUS

PDF

79.6 KB Created: 2021-08-12 16:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7c6a274368a38da633c25109426f4f3c SHA-1: b272d64f873a55a8b4874a7f7fe7d66f2990233f SHA-256: a545b035b40cbc5cbcd2600c0fc1bab0189faa59d8b48d4f51a9b833636547fb
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, suggesting a phishing or malware distribution intent. The presence of multiple links on potentially compromised infrastructure supports the classification as a malicious link farm.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4964

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/1f828a5b266eb171a7cedc63c2ecc464/jataxejafotoj.pdf In PDF document text
    • http://immobilieninvestors.eu/userfiles/file/51212765252.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082893d324b1---zubafexupufupewoz.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/leneguwevuf.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/3ieb7g132o246tir59nm18muj3/raleko.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/jesajetexudadejuniva.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/mirenapozibe.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/44774983653.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/bubesewotutenakevago.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/nedupupegipagozokovuwuk.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e44827d6ccc---35035226460.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/ridadabilikitedajivafod.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/nefisagorurapepeg.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2e65d48795dd3b5de408ff933c4b78b4/nopisakolaxegoxogigabuw.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/xazesenanuj.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928dbf79a2a---35358130782.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/gesapuvinebes.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/3fd43a4508e8a785f68e6978662082cf/66928697900.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/jojepuxomubujumew.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/37585244497.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd0e8686a9---35069930924.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/19594080797.pdfIn PDF document text
    • https://makenie.com/upload/files/72821723677.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/8784957775.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=evaluar+una+funcion+simbolica+en+matlabPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 18996 bytes
SHA-256: c2c3c80ab5ce5649a2264474e059c00adf2776989510c8017ed8382fd57c4f7a
font_01_sfnt_off00011372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11372 10788 bytes
SHA-256: c505980155e498e88a685b69d053f04f3ea01ac3c3d3a56fca77ece56ada9744

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