Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0f982d77694d91…

MALICIOUS

PDF

83.7 KB Created: 2021-03-14 04:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 10612a78aca6420be5c7780ed3302980 SHA-1: daf4498d540f81d013ac8204659d224bcb207fe7 SHA-256: ba0f982d77694d91b3dfe541ae65c20a39d1c45c54b001356705dcab9391a3a8
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains embedded URLs and heuristic firings indicating malicious intent, specifically a PDF phishing trojan. The ML classifier and ClamAV detection strongly suggest maliciousness. The presence of 'cmd_windows_7.pdf' in the document text, alongside multiple external URIs, points towards an attempt to execute commands or download further stages. The document body, though heavily obfuscated, contains references that align with a lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://xezojetit.ru/award?keyword=silabus+osn+biologi+sma+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/fagaxirupunu/9YQgjgj/26881083155.pdfIn PDF document text
    • http://ruwexidokikisi.22web.org/inward_cargo_manifest_form.pdfIn PDF document text
    • http://tusukezilineji.66ghz.com/reforming_catalyst_reaction.pdfIn PDF document text
    • http://topagudupowugi.iblogger.org/sugefijesozupel.pdfIn PDF document text
    • https://cdn.sqhk.co/gepaxulunan/djcjhDZ/black_light_room_decor.pdfIn PDF document text
    • http://bokifov.iblogger.org/navetonadenaxatesopiwasa.pdfIn PDF document text
    • http://tusukezilineji.66ghz.com/reforming_In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/124513d0-847b-49df-9969-618a7a4ff1f6/82522238168.pdfIn PDF document text
    • http://geboxazuwem.rf.gd/kokikomelifokelubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d9a6e6-498b-49fa-b955-c7c33140b97d/arduino_oled_display_tutorial_spi.pdfIn PDF document text
    • http://wokoguzesel.rf.gd/abbyy_business_card_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/witerurajin.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/nuvivezogopetuxubamelife.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/munorubidofesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b490b59-e77a-43dc-9e89-7390ab221478/17738574238.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/papepojoremofoz.pdfIn PDF document text
    • http://mejavukozabol.rf.gd/how_to_run_python_program_in_cmd_windows_7.pdfIn PDF document text
    • http://bujitajaxo.epizy.com/75746369305.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/viregujipowuru/51678562061.pdfIn macro / runtime command snippet
    • http://wevevaviz.epizy.com/60916220587.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/xovofobamerokulutolirevi.pdfIn PDF document text
    • http://gizoronof.epizy.com/romance_of_the_three_kingdoms_14_switch.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 4148 bytes
SHA-256: 5ec058abb1289c1d4edc7b545824669eca355fe63f64928039b4497ac7f389a9
font_01_sfnt_off00010cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDE 5780 bytes
SHA-256: cddb2664c86e90d5c785eb7eeb5c97b69c96093c9045d511e056d580a457162a
font_02_sfnt_off00012074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12074 9648 bytes
SHA-256: 5c1c0adc5c368f773753812688762a31bdb5499919cff3330cbbc535623b9b00

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