Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefe5f2b7461d165…

MALICIOUS

PDF

72.1 KB Created: 2021-02-21 21:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33aac92df3f48cbdeb62efce7702342f SHA-1: 7c08865b336e12f6ceecbc25ffaf66f9f4030d43 SHA-256: fefe5f2b7461d165a820d7b055cfbe90f90547c644c0c2ecf913886ca94e1f08
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier also indicated maliciousness. An external URI pointing to 'jottigo.ru' was extracted, suggesting a phishing attempt to redirect the user to a malicious site. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly indicate a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=steel+dragon+range+guide
    • https://static.s123-cdn-static.com/uploads/4460045/normal_5fef633bf277c.pdf
    • http://appless.space/52947322309lkhby.pdf
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5fdb6df15a866.pdf
    • https://cdn-cms.f-static.net/uploads/4451940/normal_5fd729cf19f45.pdf
    • https://cdn-cms.f-static.net/uploads/4417983/normal_602d50b8caadd.pdf
    • http://jnatural.space/70139255361xnnuq.pdf
    • https://cdn-cms.f-static.net/uploads/4412413/normal_601843826fa9a.pdf
    • http://pihodze.com/wazusoinmol.pdf
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5fd60fbb0b7ae.pdf
    • http://stassikorskyi.com/devutupinemet015r.pdf
    • https://cdn.sqhk.co/xejoxoka/ibbijig/kebadixizi.pdf
    • http://wiregabjuk.fun/bidogubudawafaxibevgr1cz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/liguwubore/essay_transition_words.pdf
    • 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_off0000dc45.bin
b65d3c5559595c6a87de19fe9e355819ac3016b347a983d81a96e56e9c80599c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC45 4916 bytes
font_01_sfnt_off0000ed0a.bin
1fbb3c2ae443620c8d3a15691c9383c621f793f1faa94a15ef6bb5e6bf825b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 12020 bytes

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