Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9414395be0dd8d…

MALICIOUS

PDF

85.9 KB Created: 2021-09-17 17:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 08dd754a74010be8167e27bedef3760a SHA-1: 3497ad67a3768fdead884a9aabd1e0240f613551 SHA-256: cf9414395be0dd8db1900f335bfbf77b31ad5ba2a8795e77588c2e51c4708aab
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. These links are likely intended to redirect the user to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0557

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=housefull+4+full+movie+online+play PDF link annotation
    • http://good163.cn/Uploadfiles/files/3744807587.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/32970995573.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/43585155853.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/81eddcdca4f50232d5bbff9a50ba75ae/47861418114.pdfIn PDF document text
    • http://ipceurope.be/assets/file/63192312275.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/9rf7l3ja50fkid4mlk7oripecf/dotonog.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/pipalomumirorakosidowele.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/gazewil.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16143851416348---fifasavoxowiwiwujog.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/89535264399.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/vutosovalonabokugedenalas.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/nujazepixave.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/gewopeji.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/degotukadujuxizoguxit.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/50232849536.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614469a435df8---99784434304.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe776e4a1c---kofoka.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/61852393970.pdfIn PDF document text
    • https://bor-diing.com/upload/files/daxarodemazaneleselegi.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/2374198396.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/12768982414.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/45461496028.pdfIn PDF document text
    • https://jdconstinc.com/ckfinder/userfiles/files/beguwim.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/45655748459.pdfIn 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_off0000f40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40C 10668 bytes
SHA-256: 3d6b1a305876a735bd1d66d42f95bd4a61b80b2322f3bb4dbd7d3d6f8558586a
font_01_sfnt_off00010c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C88 17948 bytes
SHA-256: 4047a3722b7352b93b658448255a287a0631644a87a6f8295bc19c9e0a6ba6e9
font_02_sfnt_off00013ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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