Malicious PDF — malware analysis report

Static analysis result for SHA-256 6213809542f9cff2…

MALICIOUS

PDF

93.7 KB Created: 2021-05-26 05:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd8217a66fd086f35e03c838228301de SHA-1: d59a1f20389820850ec5c3a59689e018b4a24070 SHA-256: 6213809542f9cff2716332a966848d497d2c3d04f45a881d91849b65c180a409
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious application. The document body, though heavily obfuscated, contains text related to downloading an 'apk', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=download+gmd+full+screen+immersive+pro+apk
    • https://cdn-cms.f-static.net/uploads/4453553/normal_603ea12b472c8.pdf
    • https://cdn-cms.f-static.net/uploads/4383445/normal_5fd735f35516d.pdf
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5fe8b2c3b571c.pdf
    • https://cdn-cms.f-static.net/uploads/4488090/normal_602e4c5793d3f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dd7482ea-4986-4c00-81f3-2e52f11592f3/creating_venn_diagram_in_excel.pdf
    • https://s3.amazonaws.com/kezemiradigu/pdf_acrobat_pro_online.pdf
    • https://uploads.strikinglycdn.com/files/6732e5a5-2fb5-45f9-b1df-977ed5a2835c/oxford_picture_dictionary_for_kids.pdf
    • https://s3.amazonaws.com/tidigudetefumof/obusforme_pillows_sears.pdf
    • https://s3.amazonaws.com/vuliwisuwig/full_hd_1080p_bollywood_movies_free.pdf
    • https://uploads.strikinglycdn.com/files/8aa92b20-cc04-4893-bffa-1c672d3e4d68/24954227623.pdf
    • https://uploads.strikinglycdn.com/files/84d192ee-3f20-4495-b7bc-36b8111f93d1/fonopuxi.pdf
    • https://uploads.strikinglycdn.com/files/ce37d81f-c382-465c-9a1a-9107d518d3d6/how_to_play_black_ops_2_on_pc_for_free.pdf
    • https://uploads.strikinglycdn.com/files/33316b8f-5088-4242-aa0d-a84707b150fe/4506500271.pdf
    • https://s3.amazonaws.com/fadobirak/bovoxejopivutuke.pdf
    • https://s3.amazonaws.com/punurum/mazusumozamu.pdf
    • https://uploads.strikinglycdn.com/files/dd88121c-2adc-4f68-a6a7-31171a6fab8a/how_much_is_a_zenith_tv_worth.pdf
    • https://s3.amazonaws.com/zumomasugipeno/xemumudujowi.pdf
    • https://uploads.strikinglycdn.com/files/70b02290-9401-484f-b536-9f220c861af0/how_to_do_istikhara_shia.pdf
    • https://s3.amazonaws.com/vatakefojunib/36914775038.pdf
    • https://s3.amazonaws.com/vabedafozo/the_cop_and_the_anthem_class_7_summary_in_hindi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a54.bin
772d6abfed1707fc64d188c88e74bf7f3a2d9ce1b68cad4514f647c8aca6177a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A54 3048 bytes
font_01_sfnt_off0001151a.bin
fe343207f35ba7d1e5346c4fbd8fce9fa00a9f475680b0b09ca8e804e803192f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1151A 5688 bytes
font_02_sfnt_off0001288d.bin
ef1b3f3969cea478d3018c5277e28ff80af42b0fa8aac3ba29ee5791d6e6324f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1288D 12860 bytes
font_03_sfnt_off00015326.bin
fcf4df20434c0157abe8648236fb4eaf8c2b118e66912a2ecff83a8946e6baa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15326 16220 bytes

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