Malicious PDF — malware analysis report

Static analysis result for SHA-256 062b14ea2edcedba…

MALICIOUS

PDF

88.9 KB Created: 2021-09-05 19:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4107ab7558ed3d7a6a8c52b0b9f2da43 SHA-1: 93b23a633066dc8f5bb8ecc613dbebeaf09f44fe SHA-256: 062b14ea2edcedbaf2f6405531e88f70b834aa8c9988428d034787110b1bfe18
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://aktifimmo.lu/userfiles/files/fokakexexibe.pdf In PDF document text
    • http://arcenevents.nl/site/upload/files/49926282225.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/6rflgnmrrmmr4tns5jvqgkr7an/12399591751.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9a04cfd91---bovelodugowas.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/14964501499.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072390b1eaa7---92903975036.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/xawiwirejoxik.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5998923473.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/53929313691.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/13400038427.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/mibidez.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16087826a7581f---kosatif.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac163ddd535---xunopikezekiwa.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/meredagofuwumasal.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/waxufexabunadoziretes.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/36861163360.pdfIn PDF document text
    • http://ghefoot.com/fckeditor_userfiles/file/nurujiwexom.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/pijosa.pdfIn PDF document text
    • http://www.farnostbobrova.cz/ckfinder/files/wowoge.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160830271a6dc7---jireromof.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/tonojepadadegojafidu.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/45883523088.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/33124475530.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ffb0946cf4da5d03082cde58e341deeb/67046494821.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb0d689340---nelidosovetupipesetakug.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/ruvamumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=eu+gdpr+law+pdfPDF 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_off0000f3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F6 10128 bytes
SHA-256: 93ee616a2dd370638a0d89b570e006a95c854daa3ef7b4df61c0791abd4ca70a
font_01_sfnt_off00010a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7C 20412 bytes
SHA-256: f6ed6005dfc2165f4a1109d353005f02bdd9d1c2e8cc34133376e0ff7369b01e
font_02_sfnt_off00013e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1