Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6634a60a1ccfdc…

MALICIOUS

PDF

76.9 KB Created: 2021-07-04 10:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ec98a7ca4ff296b4bf9b610fccf50ff1 SHA-1: 1372a39c69f28cbab28027d59f1f8269e7204012 SHA-256: 7d6634a60a1ccfdce146c6c115ca72c1bd1ba260cba4e0bec567ff7504e8efdf
124 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to URLs hosted on compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The file's structure and numerous links indicate it's designed to lure users to potentially malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ujc2mb9uck08l372mt3pbpqbhi/80340321686.pdf In PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/e9b7e23aa02e8ca9e3c4999c57e65c43/wufuza.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/o5a9686mfj72i1s4l373rhg2l8/katenogewuwetonademekol.pdfIn PDF document text
    • http://rsst77.ru/upload/files/josejabewasuni.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/67nr3dps0565899g0f2flo93u2/82830208080.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8aa1aa44a---77158389525.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/27443077738.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99e3f266e8---31600412067.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/1a0eca128187456298823c95fde245d6/64772843115.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/elc477f85uvf9vcspae5keq6f5/45508806767.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607429382a5ff---61126640115.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/kebazuganupikebexi.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8576feccdc60992bfe031a04c8163e7c/lexevafetezosoti.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/j1f3mau06jooriuu2omgruegu2/nasonojevimosidu.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/pubuxevajibilamigasemud.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/oa09u8o97big6kbvddodedc1fp/nufolixutamazeji.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc8108f694---59469861864.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/pobejujuxatifu.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/d0cee4fd68a19042f06d1dd971420747/nevakobapobo.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b71bcd3e4d6---nudekuduxexikawapibol.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/8g2ua0cn6j2a8jttk64bvpjj02/50043036613.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f39e213d4df5f8a53518d940ed4518f4/zetupaxokomabolaxo.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/togisabobigawob.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6d2ef1d1c---benegoxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=research+design+qualitative+quantitative+and+mixed+methods+approaches+creswell+pdfPDF 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
stream_002_off0000e52a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE52A 18888 bytes
SHA-256: ea43713b70001d9a5b29a09df0a43124ba339b7df905ddcd0356b4adf98babba
font_01_sfnt_off00010318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10318 11612 bytes
SHA-256: 16a457ec37052304849cbadda4658fcd608450f7698075b8aa118402138cac07