Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb13949aa23da11…

MALICIOUS

PDF

74.3 KB Created: 2021-03-16 23:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ab9a328677e5be00f782bf136cd72c36 SHA-1: 234d2bb01e6622ea527e58ac821d9fe8dd1a2a8c SHA-256: 4fb13949aa23da11bf7116aa054c24bf850df42e03741b0ac879c419d795ee2b
136 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely part of a phishing campaign. The heuristic 'SE_LOLBIN_RUN_COMMAND' also indicates suspicious command execution patterns within the document text, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jumiwimov.ru/strik?utm_term=european+journal+of+medicinal+chemistry+list+of+issues PDF link annotation
    • https://cdn.sqhk.co/migawudewiw/gcTUsha/gufuxusasitixajafazuzivor.pdfIn PDF document text
    • https://cdn.sqhk.co/marebilan/cMDihia/kerumasojupagalegajot.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/zipilegitiriwozasesuraw.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/green_marketing_project.pdfIn PDF document text
    • http://confirmationhelpcenter.com/zizujaf7nye6.pdfIn PDF document text
    • http://fastgetme.online/how_to_use_a_digital_multimeter_on_a_car_alternatorz4xn9.pdfIn PDF document text
    • http://nepatokada.mypressoIn 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/62821941-8bcb-4cc1-ac42-24c158c9dd55/how_to_connect_bluetooth_in_sony_xplod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcb7cfb-1d06-4e91-a5ef-fe4b610a3a8f/2020_snapper_rear_engine_rider_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec1b411-4f18-4638-8e78-dbecca508c38/john_deere_240_lawn_tractor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b135645-3bcc-4316-af48-72611dae454f/el_principito_y_la_rosa_frases_de_amor.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/a0769cef-9b0b-44af-92b2-67589ace06d1/how_to_use_apple_watch_gps_for_running.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6074c36-74aa-4df0-93ac-cce1725980e1/suzuzumunukunijajijipak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c6d7f0-bb46-42bb-a47f-16cf89e31cea/how_to_troubleshoot_gas_pool_heater_error_code_if.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c010f9b3-a703-449b-9897-397d3b7e9e9f/pugikusivipeterej.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/19189836510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49849aef-2ce9-48a3-b57d-bd7562c07428/how_do_i_clean_my_rug_doctor_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/31704318723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8100c1-85ff-4172-8759-0a05c5baedf3/what_equipment_is_needed_for_a_car_wash.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE344 5532 bytes
SHA-256: 66d966ea54c3973d7b18a1734cd72ae8f499ab1dc87b624ec33ce526109e9986
font_01_sfnt_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 11124 bytes
SHA-256: 403bb7cf2eb4913aa159252c5ce441bcc3845f5ff15e5dc377b875db13e9d446

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