Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3cb74a0eb8a873…

MALICIOUS

PDF

86.0 KB Created: 2021-02-24 10:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 32f78427bf44336fc68e5c4e0422c94d SHA-1: 0013601461e7f0872dd8ea34a410d1847133869e SHA-256: 9d3cb74a0eb8a873b867abe8fe34176f5191d0f270bda3fc48bb2cbb96d24a24
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, including a link farm heuristic firing, suggesting an attempt to redirect users to potentially malicious websites. The presence of embedded URLs and the overall structure indicate a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/wix?keyword=wgu+pre+assessment+questions PDF link annotation
    • https://kodugeji.weebly.com/uploads/1/3/6/0/136089350/8831605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_602dabfc1777d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445888/normal_5fff0496d3aa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5ffeba3e8e4b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_60279848689f3.pdfIn PDF document text
    • http://wamuvosuvebupa.iblogger.org/photoshop_cs5_free_download_full_version_with_crack_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500882/normal_5fcbc5c927138.pdfIn PDF document text
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/f0b0ef1ed0d0567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_6020fb6a2008d.pdfIn PDF document text
    • http://chelobaka.space/18764021801ymypp.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/6794562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_5fd17f0526641.pdfIn PDF document text
    • http://trokot-roznica.xyz/dashboard_reports_in_excel9x1t3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418381/normal_5fecb916abcdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467586/normal_5ff6012b4e1f4.pdfIn PDF document text
    • http://apelsins.space/android_simple_notification_example_stackoverflowbuf0c.pdfIn PDF document text
    • https://kitogabizog.weebly.com/uploads/1/3/6/0/136053612/getutubosetekew-topebamara.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giraxajo.epizy.com/maytag_dishwasher_quiet_series_300_parts_diagram.pdfIn PDF document text
    • http://pitefabe.epizy.com/math_minutes_7th_grade_worksheets.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001157c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157C 5244 bytes
SHA-256: 07cf99a845d275f52afef9b5b395ff26a7c75cfcd9b8c7d4080eecf3c051557b
font_01_sfnt_off0001274e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274E 10412 bytes
SHA-256: 8d3ef1d65091e88408da6c01926a2088f6ded28612994a9115398814335fc41c

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