Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f27c2adc273287…

MALICIOUS

PDF

93.7 KB Created: 2021-03-14 17:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae89e8dbe8e048d23ed531af8c853209 SHA-1: 2083562cbc6f3ea466bb178ed3a6ed863ca28879 SHA-256: 11f27c2adc273287183a63a4ab765560d7e427c6160c26268cb71709ec4929bf
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, 'midufefew.ru', which is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to the URI, suggesting a lure to a malicious website.

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://midufefew.ru/wix?keyword=oathbringer+pdf+online
    • https://cdn.sqhk.co/patagarinixa/gpjhmfX/big_little_farmer_offline_farm_mod.pdf
    • http://tidexozi.22web.org/98424899842.pdf
    • https://cdn.sqhk.co/dedogupazib/dB4jjid/65512245115.pdf
    • http://dkblogin-de.best/chemistry_coloring_book2q0zl.pdf
    • http://eu-study.ru/52863141061wigpa.pdf
    • https://cdn-cms.f-static.net/uploads/4382209/normal_603111e4ba31f.pdf
    • http://giwabuf.22web.org/how_to_fill_out_form_interrogatories.pdf
    • http://xulutiperaraki.22web.org/cement_brick_making_process.pdf
    • https://cdn-cms.f-static.net/uploads/4371523/normal_600eae0159b3b.pdf
    • https://cdn.sqhk.co/monasomeb/W3NbVk3/95836409577.pdf
    • http://promooffer.site/smartsheet_login_history4he0k.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f4e33b82-81f9-4aa7-9591-0c74b8bb82b8/63484438177.pdf
    • http://balazetesu.epizy.com/moxetezivonikiruvogeri.pdf
    • https://uploads.strikinglycdn.com/files/2b207689-6947-4488-8f3c-45d8aee3163b/used_troy_bilt_super_bronco_tiller_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/10e96466-2fe4-4887-a8b4-eb0797375a4b/como_usar_los_pronombres_relativos_en_frances.pdf
    • https://uploads.strikinglycdn.com/files/21114dad-da88-4a41-89b6-e03ae95cd8a4/ronanoso.pdf
    • http://vujipopeb.rf.gd/80805332644.pdf
    • http://matunojusorim.epizy.com/banigondu_elle_ellide_song.pdf
    • https://uploads.strikinglycdn.com/files/5f8bf521-53fb-4813-ad3a-af1d476eb9e4/77535592713.pdf
    • http://joxumokuri.epizy.com/76964168501.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012482.bin
55ab7fe3402122ba09d6431b81bc542c579a63734b52791453eccfd1d128b3d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12482 5080 bytes
font_01_sfnt_off000135b9.bin
77f62a5536bb48df52417bb3d30270ba5a41b3279608457ce0639264a741299f
pdf-font-stream PDF embedded font (sfnt) at offset 0x135B9 10652 bytes
font_02_sfnt_off00015a21.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A21 4324 bytes