Malicious PDF — malware analysis report

Static analysis result for SHA-256 398b3e4de61e7891…

MALICIOUS

PDF

64.0 KB Created: 2021-09-26 04:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1b213eba00ed11e832d048e7e12983b7 SHA-1: 763f9a2af62f914af46a870e3c442956c82fe8e8 SHA-256: 398b3e4de61e78914adcc7997b022d1e2572ad67ebc948bc37806ff903bdd0f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating it is likely a phishing or trojan delivery mechanism. The document contains numerous links, including one that redirects to a search result for 'sims 4 expansion packs download free', suggesting a lure to trick users into visiting potentially malicious sites. The presence of multiple links on compromised CMS uploads and disposable hosting further supports a malicious intent to distribute further payloads or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6907

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://robwalker.net/fckupload/file/sapolisozomujiwexajipobit.pdf In PDF document text
    • https://cargobull.cz/res/file/dilizamalemoginupofetirus.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614819c3d422d---27860652403.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/baliropanotebimefigesede.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/6026659502.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/99006227781.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/4rbctkvmcieeq0rdas0akmuaa6/26658552632.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109200103219845.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/66581244886.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/acea115763c17d16cd90650bcf362514/gunafawelavupamuj.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/xifuf.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/puvokokiditosozidez.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/2260c56cf22aacbcff2ab783ad15f1e7/bilipupeleloxubulidineted.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/dakukunexofemegolo.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/movivifitoviramexurus.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614c377e12bbc---86957184486.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/33838350995.pdfIn PDF document text
    • http://nktrading.qa/file/files/viletosop.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109031901574680.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/1a3ff0ee2baeb5fbddc2a5637d394a73/birolejakamomafituse.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/zerapatenilomij.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/gvtd9a95li0372ttjb7jdtbkvd/dujilipav.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/46742254379.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/jamodatazalawerezoka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=sims+4+expansion+packs+download+freePDF 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
font_00_sfnt_off0000b2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B0 11116 bytes
SHA-256: b708f087fd778a51c7467e3a7711ee3f799e78b0d7f28d806cdd01b68aea5dac
font_01_sfnt_off0000cca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA9 17424 bytes
SHA-256: 4df1dccef1f58074e91874110950cf58bd2275a3e0f44ab17fc02095df6b7dc5