Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5a99b4d6294247…

MALICIOUS

PDF

79.2 KB Created: 2021-04-26 18:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b6b5f7f1f55a6b34aa15faa241a6346 SHA-1: 49517977068e4c7f442bdc2d3b95975036c06249 SHA-256: db5a99b4d62942475d6d3a34c1e7900995c75becf92cf995848234485a35baa5
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/strik?utm_term=the+adventure+zone+here+there+be+gerblins+pdf
    • https://cdn.sqhk.co/ketusugedi/0iejfjc/do_black_crows_eat_rats.pdf
    • https://cdn-cms.f-static.net/uploads/4422371/normal_60474eb1566e3.pdf
    • https://cdn.sqhk.co/ribovonubod/NjhKbCP/bitizobafojenakunitipem.pdf
    • https://cdn.sqhk.co/fusaduxuw/VW3iahe/how_to_see_wishlist_on_wish_app.pdf
    • https://cdn.sqhk.co/xekixuzurim/jiDgjPv/classroom_management_plan_statement_of_purpose.pdf
    • https://cdn.sqhk.co/kosifodalab/digjajh/50362769443.pdf
    • https://static.s123-cdn-static.com/uploads/4466173/normal_5fe240946b01d.pdf
    • http://kulotaxewupugez.iblogger.org/xodejidunakofurexekepufuv.pdf
    • https://cdn.sqhk.co/noruwotil/jit9aja/best_collaboration_apps_for_android.pdf
    • https://cdn.sqhk.co/nejajevafode/xidbB9o/build_battle_minecraft_pe_map.pdf
    • https://cdn-cms.f-static.net/uploads/4371272/normal_606c99629e120.pdf
    • https://cdn-cms.f-static.net/uploads/4485001/normal_601a1354d8ed8.pdf
    • https://cdn.sqhk.co/zekafomaze/iBKKTEB/13122365951.pdf
    • http://pekuxareja.22web.org/ancelotti_book.pdf
    • https://cdn-cms.f-static.net/uploads/4419441/normal_6048055075c02.pdf
    • https://cdn.sqhk.co/gujuvizaja/rgigf9b/27327069896.pdf
    • https://cdn.sqhk.co/ramowejub/vDwjbpa/wupesipope.pdf
    • https://cdn.sqhk.co/tuwetebep/FxgjiaU/54453576704.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/991e2382-42be-48a2-a70d-8416fa15735d/1500_common_french_words_with_pronunciation.pdf
    • https://uploads.strikinglycdn.com/files/7f78780b-14b5-4df9-b255-c486d0e26d09/f1_2020_ps4_date_de_sortie.pdf
    • https://uploads.strikinglycdn.com/files/6aaed181-c09c-4c8a-a895-808819051291/keruwo.pdf
    • https://uploads.strikinglycdn.com/files/c2bc2950-dc75-4a00-bc12-00d398f28bb1/37178848536.pdf
    • http://repuvamiperubo.epizy.com/arioso_bach_violin_sheet_music.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_off0000f3da.bin
e010d386e84397c024a6fa6a9baf9102008205e27abb3580aa96903e741448ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DA 5504 bytes
font_01_sfnt_off00010695.bin
74d8a7f4efda85557fed65e929d84c59ba0e8301fae1b112455b8d7c0f6e84c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 11900 bytes

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