Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd84fae8a36ecdf…

MALICIOUS

PDF

75.2 KB Created: 2021-03-28 06:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec451ef1d2d4c7050017f1d9fc4df090 SHA-1: dd95975fe7487326002f4f8526366d91a078db65 SHA-256: 0dd84fae8a36ecdf11798e50c0d1775c634157512cac792476d9d7f8a1caa70d
96 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, one of which is directly referenced by a heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure related to photography, directing users to a suspicious URL.

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://vilenefex.ru/strik?utm_term=the+negative+ansel+adams+photography+pdf
    • https://cdn-cms.f-static.net/uploads/4421360/normal_5fd92d033741e.pdf
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5ff54a473613f.pdf
    • http://itravelgr.com/bushmaster_xm15-e2s_riflekk1fa.pdf
    • https://cdn-cms.f-static.net/uploads/4489844/normal_602b08eab2da6.pdf
    • http://wogivodugakovek.mygamesonline.org/how_to_use_fixon_denture_adhesive_powder.pdf
    • https://cdn-cms.f-static.net/uploads/4378164/normal_6058bf0511d6d.pdf
    • http://bluebadgeform.com/left_behind_book_3_free_downloadxolth.pdf
    • https://cdn-cms.f-static.net/uploads/4408483/normal_604af5477748e.pdf
    • https://cdn.sqhk.co/moxibusas/eM7D5Ee/86181399771.pdf
    • http://mebelrostov.ru/gedokikosonowov27qi.pdf
    • http://lomilinixigal.mypressonline.com/yamaha_fascino_specifications.pdf
    • https://cdn-cms.f-static.net/uploads/4446168/normal_5fd7cc3cb19ae.pdf
    • https://cdn-cms.f-static.net/uploads/4419198/normal_6053314d2b0b2.pdf
    • https://cdn-cms.f-static.net/uploads/4458616/normal_602b6df0e7beb.pdf
    • http://wedasuf.getenjoyment.net/zifoluzovawidi.pdf
    • https://cdn-cms.f-static.net/uploads/4424007/normal_6020f9fc61ed1.pdf
    • https://cdn.sqhk.co/nedupugifuka/7aZilje/piffle_crossy_road.pdf
    • http://vizilirudigub.getenjoyment.net/31934018635.pdf
    • https://cdn-cms.f-static.net/uploads/4497079/normal_6009de4bb4d89.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tabobujimo/classic_wow_priest_leveling_guide_holy.pdf
    • https://s3.amazonaws.com/tutasujal/lakitonojijasaxavop.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_off0000e6b3.bin
c302756acaed215588d63b732fa5880779afa52a425add64ddfd0b099271645b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B3 5568 bytes
font_01_sfnt_off0000f98a.bin
30ed44280449fc02ba305f4bd5a183fbfecb86d7d4697b298c4f172459ccf1dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 11104 bytes