Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7ed0efc302e4c1…

MALICIOUS

PDF

77.0 KB Created: 2021-04-06 11:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 270eaa7089ceb850ff661b8628cf3843 SHA-1: 39ffe5a5f7900466670c7eeda2bcbd2dcf874ee5 SHA-256: dd7ed0efc302e4c1ad007fe2dbcad54a48ec0e90148bced6896cb5170db4c9ed
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by the PDF_URI heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, https://bologen.ru/wix?keyword=nike+force+sky+high+sneaker+wedge+black, is likely used to redirect the user to a phishing or malware distribution site. No scripts were extracted from this sample, but the presence of external links and the high confidence score suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=nike+force+sky+high+sneaker+wedge+black
    • http://idslim-italia.site/8014787712027s1o.pdf
    • http://f13x.xyz/69695144476gpumu.pdf
    • http://zarewubizeno.mywebcommunity.org/carcinoma_de_celulas_grandes_pulmon.pdf
    • http://meetsoda.pro/32148847665abs9s.pdf
    • http://mosomupusafebin.medianewsonline.com/gepalemapifofuzogid.pdf
    • http://nigavereke.mygamesonline.org/the_lemon_orchard_line_by_line_analysis.pdf
    • http://sukutoxuwurif.mywebcommunity.org/46152977505.pdf
    • http://forkidsshop.online/zomaripuzapumimivovala22ndo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/varolexexus/35792034952.pdf
    • https://s3.amazonaws.com/juvosi/identity_theft_resource_center_2018_report.pdf
    • https://s3.amazonaws.com/zerejibixupav/bitdefender_free_windows_7_64_bit.pdf
    • https://s3.amazonaws.com/wenobagupexekap/how_does_a_shark_protect_itself.pdf
    • https://s3.amazonaws.com/lovomijelun/nidixo.pdf
    • https://s3.amazonaws.com/navoburarovada/51717218974.pdf
    • https://s3.amazonaws.com/xufujofaleki/eclipse_juno_android_developer_tools.pdf
    • https://s3.amazonaws.com/gekixadonuru/how_to_become_a_certified_regulatory_compliance_manager.pdf
    • https://uploads.strikinglycdn.com/files/b3a025ec-07b2-4c0b-aa51-2c20cc02cbef/2013_infiniti_jx35_repair_manual.pdf
    • http://dafuwinev.myartsonline.com/medical_terminology_dictionary.pdf
    • https://uploads.strikinglycdn.com/files/8707a385-80a9-4fcb-8de3-c48c42aa7275/percy_jackson_greek_heroes_hardcover.pdf
    • https://s3.amazonaws.com/telasebisu/xasajifiko.pdf
    • https://s3.amazonaws.com/veraxawewib/mr_heater_big_maxx_50000_btu_troubleshooting.pdf
    • https://s3.amazonaws.com/bisapovepizaj/ielts_speaking_answers_band_8.pdf
    • https://s3.amazonaws.com/najipavez/graphing_inequalities_worksheet_7th_grade.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_off0000e1ee.bin
00004bec7b87c55fedea316a1c36fcc8476ab0201ffee014b72f2f4e455f444c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EE 5360 bytes
font_01_sfnt_off0000f430.bin
28c37e05ecae97fb61f972f4e4626d5ed88bbf38c690459ab263ca3755583ec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 10544 bytes
font_02_sfnt_off00011839.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11839 4324 bytes

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