Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6563ea6baa2beb…

MALICIOUS

PDF

78.0 KB Created: 2021-04-04 00:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6c58bc095288c3a87a741f42a0b6b95 SHA-1: d859d0322de5fefff24a6fddd361d179a459ab9b SHA-256: 2a6563ea6baa2bebaac81b4d22fbd3960825490289cc91f33b7c0587c9b77ce0
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains an external URI pointing to a URL that appears to be a lure for downloading a malicious PDF. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving social engineering to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=bowflex+revolution+xp+assembly+manual
    • https://cdn-cms.f-static.net/uploads/4463565/normal_601dae4c2062d.pdf
    • http://xuvaxujogilo.mygamesonline.org/best_reader_windows_free.pdf
    • https://static.s123-cdn-static.com/uploads/4381095/normal_5ffa50c79a9c4.pdf
    • http://kazexajisodibu.medianewsonline.com/55664017546.pdf
    • http://segorewadidet.iblogger.org/1530931614.pdf
    • http://jogixokixese.iblogger.org/fidawemu.pdf
    • http://binisamekogona.iblogger.org/fundamentos_em_ortopedia_e_traumatologia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://velefejaforafe.rf.gd/24776846728.pdf
    • https://s3.amazonaws.com/gelawiweza/59420294358.pdf
    • http://wepogevadapafa.atwebpages.com/consulta_de_procesos_judiciales_rama_judicial_de_colombia_por_cedula.pdf
    • http://mojabumenir.epizy.com/format_moment_object_to_yyyy-_mm-_dd.pdf
    • https://s3.amazonaws.com/zobuwubedak/sheet_music_for_jingle_bell_rock_piano.pdf
    • http://runisinifozi.rf.gd/math_brain_teasers_5th_grade.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/android_lifecycle_example.pdf
    • https://s3.amazonaws.com/tirimofufemukat/amazon_web_services_tutorial_free.pdf
    • https://s3.amazonaws.com/towutoginadivu/resumen_de_la_obra_el_si_de_las_nias_por_escenas.pdf
    • https://s3.amazonaws.com/mutirexa/bimanual_examination_meaning_in_medical_terms.pdf
    • http://jadogog.epizy.com/98371394202.pdf
    • http://buzumigasox.myartsonline.com/chemistry_quiz_questions_and_answers_for_class_10.pdf
    • https://s3.amazonaws.com/gedesisumi/indian_history_timeline_chart.pdf
    • https://s3.amazonaws.com/bezorito/jizegofaburinike.pdf
    • https://s3.amazonaws.com/kujapomib/video_er_mac_os_x.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_off0000ecfc.bin
42689fe82972c4683948f457adf23bd81fa026a0b1bd5adbd782dc5870c7a4a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 5560 bytes
font_01_sfnt_off0000fff0.bin
cb968c491df6f3ac414ab479d4bec4d198b83b4caffe6c1966286a37eb98aafa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 12112 bytes

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