Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6cf558f577b62d2…

MALICIOUS

PDF

79.6 KB Created: 2021-03-11 18:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33f2096bc2ac2023cc414dcdb7de83c0 SHA-1: 534d7e606a551323cfa9f1435d7906c109bdde3d SHA-256: e6cf558f577b62d22f63690c3595179fab3c12fbf0fc93c003b7d96ccbed5e85
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains keywords related to the embedded URI, suggesting a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/award?keyword=coraline+comic+book+pdf
    • http://nesobaka7.xyz/befarasazgwosl.pdf
    • https://cdn.sqhk.co/wavefekus/fIifjcZ/9124438524.pdf
    • http://submonster.xyz/50_pips_a_day_forex_trading_strategyh96yv.pdf
    • http://newyearshop.site/470302296629iii0.pdf
    • http://foodguideblog.com/bogavelorix03y.pdf
    • http://zdorovie-vashe-vse.xyz/amortization_schedule_calculator85roj.pdf
    • https://cdn-cms.f-static.net/uploads/4468536/normal_5fd66f7c65f97.pdf
    • https://cdn.sqhk.co/goxorotomo/gjwVAGW/ho_ho_sheet_cake_recipe.pdf
    • http://libertinemodels.com/27604707770divo6.pdf
    • http://ujjjrrrrr.space/isc_biology_class_12_textbookrdazr.pdf
    • http://epipog.com/mobogenie_pc_2018whtkv.pdf
    • http://hookup750.website/tascam_dr-05_vs_dr-07xjfzml.pdf
    • https://cdn-cms.f-static.net/uploads/4425913/normal_5fe636eb0f8b0.pdf
    • http://dayzcommunity.info/pepuxirozavlz3s7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_8aa78e03e7f5424c9ca3daa8bc0f83e2.pdf?index=true
    • https://s3.amazonaws.com/sajatesawodiji/lolipotuxowonaratozu.pdf
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_11a18fdf1a994078b05e554635acf0a8.pdf?index=true
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_b2f36c089f0443829c71d57d51e0c9e0.pdf?index=true
    • https://s3.amazonaws.com/ruzaganog/what_are_three_things_about_yourself.pdf
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_137e3ca0d133453897015ed089022805.pdf?index=true
    • https://s3.amazonaws.com/zufojadibi/gdb_commands_sheet.pdf
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_c046bc5b5d0a410bb5ad4c63778bac46.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef45.bin
7b985d1663d3dafe29332ca832acc7d6b7622e7f32706e48c485277663d9c08b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 5056 bytes
font_01_sfnt_off0001004a.bin
b9dd53cec4c91a130a9d7690b7b657e6aaccc1c32d851ffccdacd0890b8f160f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 10072 bytes
font_02_sfnt_off000122c9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122C9 4324 bytes

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