Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b892945eed2bd7…

MALICIOUS

PDF

86.7 KB Created: 2021-08-22 14:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 23fa8fdf335e91c4f939b61db5943224 SHA-1: a5a30c16047d4fd40f812fce26275f5fca1c6ad3 SHA-256: 05b892945eed2bd757baf99b9f707f9ec4442c8a49b8ef94396902a036ae6ca8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised WordPress installations. These links are likely intended to redirect the user to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier clean score 0.1617

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://crysiq.ru/uplcv?utm_term=the+man+who+built+america+episode+6+worksheet+answers+quizlet PDF link annotation
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8ab9ab688---54415915121.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/b179d33857de0a36e28243e6ea0939e7/vemik.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/dabixilivolakewe.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/931f829db102c37a1b81580c410f5b86/24967948391.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/f971e6d3c6ba9e04f21e1a3105c320c8/22889533682.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/kalefuwerer.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/boledemad.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/75056543203.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/rofarimute.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d8114bcfc---25608726600.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/meferuwajixi.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/20a82835b21b24f32443b0017c05d325/dariziresaripa.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/38b1d59eae4cb738f4dec44ac2d09049/97849239517.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/841489eb981286666c55af917a94af29/jopix.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/23914749414.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/e736ed16078551dd23f2244422cd7fb2/35380517421.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b27bc9d3df7---fakob.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/bofomoga.pdfIn PDF document text
    • http://childhood-matters.com/clients/49507/File/robogipoxap.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/50112875896.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/48963596672.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/45764818203.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/saxuxewikosazipasa.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/0fe0da4ce04377c6e903686b224420bd/83578161469.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d8488001320b9dcc272a47133e10739a/4881810405.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/5fde71122b2bb3a5790e86efbbc94041/lewebujanonavam.pdfIn PDF document text
    • 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_off00010436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10436 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4D 11536 bytes
SHA-256: 50d278556a2388e2032453507bfffab4ce2fb7705cbe0d2805b5ca6d0fa98d9c