Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66db0a7d8841987…

MALICIOUS

PDF

75.3 KB Created: 2021-03-28 23:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fec39184afc788c5bf442692046a611 SHA-1: 48f4bd1763186ffe7c2a445e9aa772a6d08eb76c SHA-256: f66db0a7d8841987ef009e8fbd82367b79679f8cf5ecc47ac2754c0f16c262a2
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URIs pointing to external websites, suggesting a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure itself are indicative of malicious activity, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/aws?utm_term=panasonic+th-42px75u+remote
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/wuxurukalenud.pdf
    • https://static.s123-cdn-static.com/uploads/4492580/normal_60003bd8292cf.pdf
    • https://cdn-cms.f-static.net/uploads/4495246/normal_603c3ba6ea6de.pdf
    • http://vetapako.22web.org/liwovumiku.pdf
    • http://creditreportus.info/rexegufor0cshk.pdf
    • http://narelavupes.22web.org/liwatixaruwuvider.pdf
    • https://rugulobasogaje.weebly.com/uploads/1/3/4/7/134770789/zapezuki.pdf
    • https://static.s123-cdn-static.com/uploads/4371543/normal_5fc8b8d3b577f.pdf
    • http://kenanimit.iblogger.org/2036965933.pdf
    • http://ijmalan.xyz/riridavizes97i5k.pdf
    • http://remontnatali.ru/kelokenupedieuomi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nufavonazimu.epizy.com/coconino_county_sheriff_incident_reports.pdf
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_27457e14939048f0ba4dd79d1201d4b2.pdf?index=true
    • http://xelelurez.rf.gd/10558396147.pdf
    • http://gigapexolazet.rf.gd/gojutewajuzew.pdf
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_a75fed40a21844c29d30314bcbd9f099.pdf?index=true
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_f8a638f9a9a344938fced4f2f2dbdf6d.pdf?index=true
    • http://xudufefi.rf.gd/bamavovujoziluwufaxekenoj.pdf
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_c4974f92a56a4b0a9dbab0aff78f0df8.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2fb.bin
e6a8d466a53b46ad47eca442c3cc4ba0c6cc622c542454557c4dec18b884ac9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 5664 bytes
font_01_sfnt_off0000f639.bin
912905a3f6d03350682be0cbd254776c1a15a5f0154a5b53cef802795356ffc9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF639 12072 bytes