Malicious PDF — malware analysis report

Static analysis result for SHA-256 850be564575233a7…

MALICIOUS

PDF

77.3 KB Created: 2021-02-19 09:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ee71046ef80ac763b2cf4e3acc1b13a8 SHA-1: 6e59df294d8fff22bbe7fab11d12ce2e625a9629 SHA-256: 850be564575233a723938cab782285263cf8094b74cef90b2b88cd82cf69d4ca
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to 'Christian values' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=what+are+some+core+christian+values PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424010/normal_5feef45fe6e57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470835/normal_5fe63607e0e2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fd28229659a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465685/normal_5fde0716e4e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_60143d99e920c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_60106beead3b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_6016c3bd042d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453115/normal_6004443ab75cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_60174454d37fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_602ea87dae4ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5fde8f6a6a8f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479707/normal_6009af1a0e13c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_60136bb0a3604.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487618/normal_5fc9627d1a7f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5fe6d43772898.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/aliens_1986_hd_movie.pdfIn PDF document text
    • http://girifej.epizy.com/71675689144.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 4992 bytes
SHA-256: ecfa7e811d2e909b4880ae4fa4f42ffb550030309cd41baa45211daf9d831897
font_01_sfnt_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 10780 bytes
SHA-256: 06691977f8a4198e3e1e652d12978b88a95e397cc24fba9cde861e7bf3c9d03d
font_02_sfnt_off000119b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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