Malicious PDF — malware analysis report

Static analysis result for SHA-256 614a71212d4eb397…

MALICIOUS

PDF

77.6 KB Created: 2021-03-12 06:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223e9ec2b733be71ff361d79d7fc7fa9 SHA-1: 9e8586a92d1744ee0c5c33577d7c9e5f08d59820 SHA-256: 614a71212d4eb397bc5ae21c0cfb5eb6453738bb6ce0b34a4bb8b72d8fdc3902
136 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and ML classifiers. It contains external URIs and embedded URLs that point to potentially malicious content, suggesting it's a lure for phishing or malware distribution. The presence of 'curl_post_multipart_form-_data.pdf' in the document text hints at potential data exfiltration or command execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://jottigo.ru/award?keyword=amendment+in+motor+vehicle+act+2020+pdf
    • http://pivolirarorip.mypressonline.com/75566989026.pdf
    • http://vazawujuzu.sportsontheweb.net/xupodoxejufulepoli.pdf
    • http://lejunuzegakikuv.mypressonline.com/nogedirobosijop.pdf
    • https://uploads.strikingl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/56ffd2b0-25d4-49a0-a416-a3511d0b397e/marketing_digital_curso_gratuito_com_certificado.pdf
    • https://s3.amazonaws.com/dumupa/33569639936.pdf
    • https://s3.amazonaws.com/jefazaxal/2314973278.pdf
    • https://s3.amazonaws.com/dinilederu/lobinujegu.pdf
    • https://s3.amazonaws.com/figidireki/12315994195.pdf
    • https://s3.amazonaws.com/verirejon/curl_post_multipart_form-_data.pdf
    • https://uploads.strikinglycdn.com/files/059a72cd-e6c5-4f9c-9ad1-c165a6bde972/sadeno.pdf
    • https://uploads.strikinglycdn.com/files/f06d3d5a-9a56-4e3e-8e89-3409bb698c17/can_you_hack_comcast_cable_box.pdf
    • https://s3.amazonaws.com/sorogamat/how_do_i_adjust_my_bushnell_tour_v3.pdf
    • https://s3.amazonaws.com/satedafadusizo/19409268628.pdf
    • https://s3.amazonaws.com/risalenefazozo/13138703718.pdf
    • https://uploads.strikinglycdn.com/files/07b14f4d-0958-4fee-9555-c697ae569de4/36479535153.pdf
    • https://s3.amazonaws.com/midaguvimabof/how_to_use_intellisense_blood_pressure_monitor.pdf
    • https://s3.amazonaws.com/pokorevalaxex/kumon_math_answer_book_level_f.pdf
    • https://s3.amazonaws.com/zewimu/28382497938.pdf
    • https://s3.amazonaws.com/dixaleko/tadutifedarilodax.pdf
    • https://s3.amazonaws.com/napoledunadigo/full_form_of_dms_shoes_in_army.pdf
    • https://uploads.strikinglycdn.com/files/1dc95557-5f23-418a-b148-30a5b26e90f6/estructura_de_un_texto_descriptivo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d8.bin
b43c434ff37a7fbbdaa01a2f5d7b9c7f482ab88fc98124b8a6698a43a51d3725		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 5540 bytes
font_01_sfnt_off0001058b.bin
73793b97cff693416fa3a681edcbfaf2c3e9ad3d6963a9b7e818d6664be84291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1058B 10200 bytes

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