Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd36dc7b3c58ada…

MALICIOUS

PDF

68.6 KB Created: 2020-12-18 02:12:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fa4daf0289752e59f762d36cd7d70453 SHA-1: 7374c375fa1e35c19fb77ae4458f2b373d1a5fd4 SHA-256: 5dd36dc7b3c58ada1db7307cdd51f78517623015b03778a42588f1b54741bc3b
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains a lure to install a browser extension, a common social-engineering tactic for malware delivery. It also hosts a link farm with numerous PDF files, one of which redirects to a known malicious domain. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 https://gettraff.ru/aws?utm_term=attestation+form+for+police+verification+in+marathi In PDF document text
    • https://pebenari.weebly.com/uploads/1/3/4/5/134518206/zelogabib-korakaset-ximar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5fbd5aefa0774.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xajowu/71957251489.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc541ac5e8e827d42aa8726/t/5fcae96fda45e86cca990c90/1607133553018/kubivafu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fc125524e98326c0239376e/1606493523183/vodavuvupix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc553872e537a05ef266587/t/5fcbb0be1df7590d80e569a3/1607184578760/gizmohub_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/lezolakedezanebipolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099db29e-769a-4c9e-a701-851597be780b/xulesujogasabufufala.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e7c288c99b6d37a72027/t/5fc24d4ef3de5e49b5afbc7c/1606569295129/vulcan_750_seat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe27c8145a8629dc7a46b2/1606297545024/large_terracotta_pots.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c66b27a199023ab4af32/t/5fc12d94f8cdb769c60dd786/1606495636881/cuales_son_las_lineas_imaginarias_verticales.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe09a63f75b166439c42d0/1606289831259/your_deeds_are_your_monuments_meaning.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0000bae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE6 5304 bytes
SHA-256: 795ebff3792b98d259fa1eb60f30864d5e90303648e6977a2497924511b75e89
font_01_sfnt_off0000ccd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD2 10300 bytes
SHA-256: 116513bc9102841e2a79396a3208b7ecea275b1b8c16ccb0f81781a7af139a59
font_02_sfnt_off0000f008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 16172 bytes
SHA-256: 6e699eab9a6fef16b3ea923df7b93ce1c5cbd97c7a594d359cd98c90be4a35f1

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