Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b28284b578f294…

MALICIOUS

PDF

96.1 KB Created: 2021-04-05 11:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ab81d290ced5871ff4517d96659c1e7 SHA-1: 287a59a0330e5f88e6961cfaa7df0a8a0c439825 SHA-256: 84b28284b578f294573e791e24e78cf9728e49bef6e3e8527295a4203aa6c341
104 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The presence of an external URI pointing to 'jottigo.ru' and a heuristic for a visual download button suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to facilitate malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=physics+holt+answers+pdf
    • http://graatorama.space/63039590359p4w13.pdf
    • http://prolac.ru/22_jump_street_putlockersxmhx6.pdf
    • https://cdn.sqhk.co/nowonipewo/cjhijaT/72747395600.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • https://cdn.sqhk.co/befozaxulot/Hiagf82/std_10_sanskrit_textbook_maharashtra_board.pdf
    • https://cdn.sqhk.co/zafilivopupu/hcgejf1/45424801801.pdf
    • http://zakewabo.scienceontheweb.net/17307585833.pdf
    • http://jukojadijomefar.medianewsonline.com/genie_intellicode_not_working.pdf
    • https://cdn.sqhk.co/fikalibumi/ggQ7AlB/emulator_android_studio_not_working.pdf
    • https://cdn.sqhk.co/gewewoturila/QjarhPj/logo_quiz_flags_games.pdf
    • http://kubosikavudux.mygamesonline.org/famuvajodebikipojodob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://liroporuki.myartsonline.com/longman_academic_writing_2.pdf
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_b27064c1a88e4db3bfc13c4909fc9164.pdf?index=true
    • https://s3.amazonaws.com/lusabifef/korewasekivisudaluzowovan.pdf
    • https://uploads.strikinglycdn.com/files/c0eee347-8302-4380-9b49-76c95a93f91c/simple_electronic_projects_for_students_with_circuit_diagram.pdf
    • https://s3.amazonaws.com/bubodeliza/20826923750.pdf
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_5853ab461736411aa7197fd6756ac724.pdf?index=true
    • https://uploads.strikinglycdn.com/files/acdc029a-c855-4346-b5e4-51b73a53d89c/82606908665.pdf
    • https://s3.amazonaws.com/padanivozeb/3725387632.pdf
    • https://uploads.strikinglycdn.com/files/94aad41e-5663-4bfa-94aa-9b4819fb19ae/zatirage.pdf
    • http://dowuvoduwitovos.atwebpages.com/xutigalaxemi.pdf
    • https://30372bae-fb3d-4285-bee0-d91e70c22047.filesusr.com/ugd/835091_0ea610d4cead46c593e853d6b1a1b415.pdf?index=true
    • https://s3.amazonaws.com/sefukirexuwekij/finally_obamium_meme_template.pdf
    • https://uploads.strikinglycdn.com/files/af663934-8a16-40ea-a8d9-b240d70d9086/gitiwugavabuwaf.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122cc.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122CC 6744 bytes
font_01_sfnt_off000133b1.bin
96fb859947633f0f92590c7a5bdfe210e4c6a278c9749cca4f0ab08bb50888d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133B1 5436 bytes
font_02_sfnt_off00014643.bin
bc6cd7c77275409d4b7ee31b624edc3a2d376df9158f1f987542c8773c992e51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14643 13564 bytes

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