Malicious PDF — malware analysis report

Static analysis result for SHA-256 7121ffc5851f82c3…

MALICIOUS

PDF

77.6 KB Created: 2021-07-07 02:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 238ff1d0a843eb0186baa624ad2602bf SHA-1: 7e027345f3cc145ff02d73deaf2be057821ae640 SHA-256: 7121ffc5851f82c33ba9950855d639b8019bd9cbfeb50a693fa4dbfd36a9efd0
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed that the PDF contains a link farm pointing to multiple websites, many of which are hosted on compromised CMS platforms. These links are likely intended to lure users into phishing scams or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4212

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://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/5f440bf10847664c35943eb9e0207b05/99034207480.pdf In PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608addcfb476a---zelifolozomosalofixo.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/18337324230.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/gutaxefanaras.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8890e1f312---53836673633.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/789fd414e8829485f2998ffd063a5c06/35626188801.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/zirifodixokavibaxeromo.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609be48fdeb70---nudepuvizi.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c21b6016465---59913598518.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/1685818866.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160929343a39f4---jagivixobunina.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/75347789843.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0073b5f3b---54799370941.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/c3416ec157fe7e78c9fb7663181d54f5/34977174318.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/hh9m0qj3si9tg9jb1q18c2t9bn/viborubasogevasumugat.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c398137d1a9---wafowokovilipurisop.pdfIn PDF document text
    • http://euro-ex.net/images/blog//file/48066100886.pdfIn PDF document text
    • http://zjpjxt.cn/upload/uploadfile/file/18365999829.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/87623567613.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608807b266107---11146582330.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/tularitapatet.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2cd2fed3062a378581c15c8a04effb0d/zopolufa.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/xigeze.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/jasusezitaripo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=indian+river+map+with+state+boundariesPDF link annotation
    • 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_off0000dcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFA 10952 bytes
SHA-256: e981a657059b5e02d7d248040f0eaa7bd2a07567c191c6ce94bf038ea59dcb71
font_01_sfnt_off0000f600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF600 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E12 16804 bytes
SHA-256: 069dec5ed61f75410d7215950d544c96cdc33552a1548a2f00147d33427167eb