Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e8a4e5d102b7dd…

MALICIOUS

PDF

80.2 KB Created: 2021-03-19 13:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf8ae5423dfa3635e4ffca9771025651 SHA-1: 2b16692162439a9f69fec6f733acf19502bd92c9 SHA-256: a4e8a4e5d102b7ddcdfe4afe1e03a9e0713d29249c62575ea0ab5612bc3b7981
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were directly extracted, the presence of an external URI in a malicious PDF suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/123?utm_term=bukunmi+oluwashina+music+videos
    • http://tizadejaso.getenjoyment.net/afcat_previous_year_question_paper_with_answer_key.pdf
    • http://collegegraduatecentraldating.com/how_many_layers_make_up_the_tcp_ip_model8s3f6.pdf
    • http://zedateve.mypressonline.com/bejizeluwawinijeviginikos.pdf
    • http://lisipezasuk.iblogger.org/gugakefovefakaxotade.pdf
    • http://zavemobavozake.22web.org/radem.pdf
    • https://cdn.sqhk.co/gafokoru/bFiggfu/19937405269.pdf
    • http://boomua.site/beethoven_piano_sonata_8_sheet_music3149s.pdf
    • http://hdsamara.ru/guzudobumefekevetopijiy9uhv.pdf
    • http://hardcreditcheck.info/xaxuwuxofeku2qwmj.pdf
    • http://subuxiwubemew.getenjoyment.net/search_chrome_iphone.pdf
    • https://cdn.sqhk.co/busumodofu/dsijhdL/snake_plant_benefits_nasa.pdf
    • http://twitter-center.com/family_portrait_photography_tips_and_trickstgdpj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kibavutibeved/free_developer_android_apps.pdf
    • https://s3.amazonaws.com/pewibim/antrenman_geometri_2.pdf
    • http://jabenesejamuji.rf.gd/arcane_trickster_feats.pdf
    • https://uploads.strikinglycdn.com/files/fb0d8cd6-a266-425b-8416-a907914e5036/kojotumevatezeraxoreriv.pdf
    • http://ninanupazazudad.rf.gd/63725831325.pdf
    • https://s3.amazonaws.com/jimugivos/laxojepodumibi.pdf
    • https://uploads.strikinglycdn.com/files/13de2c33-6483-4db5-9af1-5e0cad6f1d6b/imaginarium_mountain_pass_train_set_instructions.pdf
    • https://uploads.strikinglycdn.com/files/66590171-5ca0-41d7-aa08-f3de4def69b9/litegolezafututotapugen.pdf
    • https://uploads.strikinglycdn.com/files/1b34e4d9-bbd9-47b4-8b24-904ba002c466/37299359998.pdf
    • http://lelekon.epizy.com/fozunexudevetemexezezaga.pdf
    • http://xowobovu.myartsonline.com/65400567122.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e686.bin
5cbdac31b4e96228e8f8597b2fcff315efcc20d0c4562361b80726ff2240ec33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE686 5348 bytes
font_01_sfnt_off0000f8ad.bin
abf73ab15a948845d31adf2637de3d38b0dcee3d240bf2391d946df1111e6d37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AD 11360 bytes
font_02_sfnt_off00011e9f.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9F 16036 bytes

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