Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ddf8b94d3964646…

MALICIOUS

PDF

81.4 KB Created: 2021-07-08 11:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b0bd1db65b7412384facc6d5dea96d81 SHA-1: 3b980956553071b041a4d0889f3caaf0977a62cc SHA-256: 5ddf8b94d396464644ac9fe7970dcf29163ee62957cf76876c6bdb1bc51537bf
124 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress upload directories, indicating a phishing or malicious redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and the presence of link farms suggest an attempt to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3798

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 http://statsale.com/data/upload/ck/files/kifujonufiwunupiz.pdf In PDF document text
    • http://ersatzmonitor.de/userfiles/file/virujepulejisul.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/38008112077.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fkv91ad7prsl0q9algcesiauu2/98552280272.pdfIn PDF document text
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/2609273959.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/eimlsjp1um8fn3cc8c32iphmtr/59876988419.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160942f2002a32---pejoruwidogopi.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4937ef731---1322916930.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ffc8a48d9---80434557399.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/59c1e7e4d39761b1b292505e7b8c7c2e/65573490316.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f30ec8774a629d73f257240f34ee9603/dilaxojiz.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/10110830921.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/603ma83skg5k3ihpt8ol1rjvor/zidajewatogibuluwu.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48663459253.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160961b4358b5a---67305852009.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790e02dc5c6---jifizevijokavoso.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607887f25242d---36748362124.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/dofusotowakuxazaliwikas.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/pazajesuledekitegogedilo.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/dodoxatibafubajotafurenu.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/rq75sipvajt50crso45tkpaepk/ruwivusonelawasekazile.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/vovewokinedosiga.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd17b6daaac---13753257801.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b46676f25---10081167998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=mean+and+variance+of+the+sampling+distribution+of+the+sample+meanPDF 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_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 17444 bytes
SHA-256: 489473db89b012479083af690745bb490afee9b1bdcd579664b6e43e56438203
font_01_sfnt_off000115a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A5 11368 bytes
SHA-256: f4a192e17dae857b458bcae8d96c6125a12334889574975283f34e86d08de3af
font_02_sfnt_off00012fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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